Math Sections
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
---|---|---|---|---|---|
Experimental Probablity | is probablility based on data collected from repeated trials
🗑
|
||||
A toy car manufactor inspected 2000 toy cars at random. The manufactor found no defects in 1899 toy cars. What is the probablity that a car selected at random had no defects? Write the probability as a percent. | Experimental Probablitity: 1899/2000= 0.9495= 94.95= 95%
🗑
|
||||
Theoretical Probability | P(event= number of favorable outcomes/number of possible outcomes
🗑
|
||||
Suppose a bag contains 2 black, 3 blue, 3 green and 2 red marbles. 1-What is the probability of reaching into the bag randomely selecting a red marble? 2-What is the probability of randomly selecting a red or black marble? | Theroretical Probability:
1- 2/10=1/5 (1.0/5=.2= 20%)
2- 4/10=2/5=.4= 40%
🗑
|
||||
Geometric Probability | Desired outcome/Total outcome
🗑
|
||||
You purchase 1 raffet ticket. 500 are sold. What is the probablitites? | P (Win) = 1/500, P (loss)= 499/500
🗑
|
||||
Tickets sold by class: 9th grade 500 blue tickets 10th grade 650 red tickets 11th grade 700 green tickets What is the probability that the winning ticket was sold by an 11th grader? | P= 700/ (500+650+700)= 700/1850
🗑
|
||||
Mutually Exclusive Events | can't occur at the same time
🗑
|
||||
If A+B are mutually exclusive events then... | P(A or B)=P (A)+P(B)
🗑
|
||||
If A+B are not mutually exclusive events then... | P(A or B)= P(A)+P(B)-P(A and B)
🗑
|
||||
24% of the students at the local high school are seniors, 16% are juniors, 34% are sophomores and 26% are freshmen. If a student is chosen at random from school, what is the probability the student is a senior or a junior? | Mutually Exclusive
P(senior or junior)= P(senior) + P (Junior)
= .24 + .16
= .40
= 40%
🗑
|
||||
There are 5 types of fish in the tank at the pet store. 10% of the fish are tiger-striped, 20% are angelfish, 15% are catfish, 30% are tetras, & 25% are zebra fish. What is the probability that Joe gets a zebra fish or a tiger-striped fish? | Mutually Exclusive
P(zebra or tiger)= P(zebra)+P(tiger)
= .25 + .10
= .35
= 35 %
🗑
|
||||
Dependent Events | Affect each other
P(A then B)=P(A) P(B after A)
🗑
|
||||
A bag contains 6 red and 4 blue marbles. What is the probability of randomly selecting a red, then a blue marble, without replacing the first? | Dependent Event
P(red)=6/10
=3/5
P(blue after red)=4/9
P(A) x P(B after A)
3/5 x 4/9= 12/45 = 4/15
🗑
|
||||
Independent Events | Dont influence each other
🗑
|
||||
Suppose the letter tiles shown were despoited in a bag. What is the probability of randomly selecting an I and a U? | Independent Event
P(I)=2/15
P(U)=2/15
P(I+U)= 2/15 x 2/15= 4/225
🗑
|
||||
Tree Diagram | Suppose you go to a deli which has 3 types of bread, 3 types of meat for possible sandwich combinations. How many combinations can you make? (Answer 9)
🗑
|
||||
Counting Principle | When tree diagram is to big (M x N)
🗑
|
||||
At the weeding there are 5 salad choices, followed by 6 choices for the main course. How many ways can you choose a salad folloed by a main course? | Counting Principle (5 x 6=30 choices)
🗑
|
||||
Chandy throws an even fancier wedding and serves a 5 course meal. There are 3 choices for each course. How many different meals can be chosen? | 1 2 3 4 5 = courses
3 x 3 x 3 x 3 x 3 = 243 meals
🗑
|
||||
Find the number of permutations possible for the letters NESTA. | N E S T A
5 x 4 x 3 x 2 x 1= 120
🗑
|
||||
Sam, Janet, and Bob wait in line for a concert. In how many wasy could the 3 of thme line up? | 3 x 2 x 1=6
🗑
|
||||
Permutations | nPr= n (n-1)(n-2)...
Order Matters!!!
🗑
|
||||
Simplify 8P5 | n=8, r=5
8(8-1)(8-2)(8-3)(8-4)
8 x 7 x 6 x 5 x 4
6720
🗑
|
||||
Combinations | Order doesn't matter!!
🗑
|
||||
Combinations | nCr= n!
______
r!(n-r)!
🗑
|
||||
A 3 person committe is to be chosen from a group of 15 students. In how many ways can the students be chosen? | 15C3
Answer... 455
🗑
|
||||
nCr | Stand for the number of cominations of n objects chosen r at a time
🗑
|
||||
nCr | nPr
---
rPr
🗑
|
||||
There are 7 pizza toppins, you can choose 3. | n=7
r=3
7C3=7P3=7 x 6 x 5= 210
--- ---------
3P3 3 x 2 x 1 =6 = 35
🗑
|
||||
Mean | add them all up and divide by #
🗑
|
||||
Mode | # that accures the most
🗑
|
||||
Median | Middle #
🗑
|
||||
Additives | How many # were added
🗑
|
||||
IQR | Q3(median) - Q1(median)
🗑
|
||||
Variance | All the numbers individually subtract the mean, then squared. Total them then divided by the additives
🗑
|
||||
Standard Deviance | Variance square root
🗑
|
||||
Solving cryptarithm | Guess and check
🗑
|
||||
The sum of two consecutive terms in arithmetic sequence 2,7, 12, 17... 499. Find the 2 terms. | n=the first
n+5= second term
n + n + 5= 499
2n + 5 =499
2n = 494
n=247, n+5=252
🗑
|
||||
Communtative Property | When tow numbers are added, the sum is the same regardless of the order of the addends. For example 4+2=2+4
🗑
|
||||
Associative Property | When three or more numbers are added, the sum is the same regardless of the grouping of the addends. For example (2+3)+4=2+(3+4)
🗑
|
||||
Additive Identity Property | The sum of any number and zero is the original number. For example 5+0=5
🗑
|
||||
Distributive Property | The sum of two numbers times a third number is equal to the sum of each addend times the third number. For example 4 x (6+3)=4 x 6 + 4 x 3
🗑
|
||||
0/x=0 | All intergers except 0
🗑
|
||||
x-10x=-9x -9x=-9x | All intergers
🗑
|
||||
x2=-49 | No solution is possible
🗑
|
||||
(-x)3 | Neither
🗑
|
||||
Higher the power... | lower in value
🗑
|
||||
x+y=y+x | Always true
🗑
|
||||
x-y=y-x | Sometimes True
🗑
|
||||
x-y=x+y | Sometimes True
🗑
|
||||
xy=x+y | Sometimes True
🗑
|
||||
xy+x2=x(y+2) | Always True
🗑
|
||||
x . x=x2 | Always True
🗑
|
||||
x+x=x2 | Sometimes True
🗑
|
||||
x+y=x | Sometimes True
🗑
|
||||
x+1=x | Never True
🗑
|
||||
xy=yx | Always True
🗑
|
||||
x . 0=x | Sometimes True
🗑
|
||||
-(x-y)=-x-y | Sometimes True
🗑
|
||||
x0=0 | Never True
🗑
|
||||
x/y=y/x | Sometimes True
🗑
|
||||
1/x=0 | Never True
🗑
|
||||
3x+3=x+1 ---- 3 | Always True
🗑
|
||||
The difference between 2 even # is an an even # | Always True
🗑
|
||||
The product of any two even #'s is an odd # | Never
🗑
|
||||
The difference between any two odd numbers is an odd # | Never
🗑
|
||||
The product of any two odd # is a odd # | Always
🗑
|
||||
If x is greater than y, then 3x is greater than 3y | Always
🗑
|
||||
If x is greater than y, then x is greater than -y | Never
🗑
|
||||
Teh square of a number, x, is greater than x | Sometimes
🗑
|
||||
If 2x is greater than 2y, then x is less than y | Never
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
DanceLots
Popular Math sets