Independent Probability
Venn Diagrams
Tree Diagrams
Dependent Probability
Frequency Tables
100
P(Green)? Answer as a percent.
1/5=0.2=20%
100
P(Popeyes∩Wendy's)? Answer in a fraction, decimal, and percent.
12/50=0.24=24%
100
What is the percent chance of a fast ball?
70%
100
Probability of choosing a white ball, not replacing it, and then choosing a white ball again? Answer as a percent.
(3/10)(2/9)=6/90=1/15=0.067=6.7%
100
How many adult males are there?
86-52=34
200
David is choosing a number between 1 and 10. What is the probability that he chooses the number 4? Answer as a percent.
1/10=0.1=10%
200
P(WendysUPopeyes)? Answer in a fraction, decimal, and percent.
32/50=0.64=64%
200
If there were 126 total balls, approximately how many were fastballs?
(126)(0.7)≈88
200
Probability of choosing a blue sock, not replacing it, and then choosing the other blue sock? Answer as a percent.
(2/9)(1/8)=2/72=0.0278=2.78%
200
What is the P(Girl)? Answer in a percent.
100/240=0.42=42%
300
P(Rolling Odd) on a six-sided die. Answer as a percent.
3/6=0.5=50%
300
P(Wendy's)? Answer in a fraction, decimal, and percent.
14/50=0.28=28%
300
If there were 50 total knuckle balls, how many of them were strikes?
(50)(0.2)=10
300
Probability of getting a red ball, not replacing it, and then getting a yellow ball. Answer as a percent.
(4/9)(2/8)=8/72=0.11=11%
300
P(Right-handed Boy)? Answer in a percent.
126/240=0.525=52.5%
400
Find the P(Tails Twice in a row) when flipping a coin. Answer as a percent.
(1/2)(1/2)=1/4=0.25=25%
400
Probability of picking someone who likes neither, not replacing them, and then picking someone who like neither. Answer in a fraction, decimal, and percent.
(18/50)(17/49)=306/2450=0.125=12.5%
400
P(Fast ball AND Strike)? Answer in a percent.
(0.7)(0.6)=0.42=42%
400
In a standard deck of cards, calculate the probability of choosing the Queen of Hearts, not replacing her, and then choosing a heart card. Answer as a percent.
(1/52)(12/51)= (12/2652)=0.0045=0.45%
400
What is the probability that I pick a left-handed Boy or a right-handed girl? Answer in a percent.
(14+90)/240=104/240=0.43=43%