WorksheetsConditional Probability
Total questions: 10
Worksheet time: 16mins
True or false?
If two events are independent, the P(A|B) = P(B).
True
False
If two events are independent, then P(A and B)=P(A)×P(B)
True
False
Classify the events as independent or dependent.
A ball is selected from a bin of balls numbered 1 through 10. It is replaced, and then a second ball is selected.
independent events
dependent events
Use the Multiplication Rule to find the probability.
A coin is tossed and a die rolled.
Find the probability of tossing a tail and then rolling a number greater than 2.
1/3
1/2
1/6
1/4
Worst President: In a sample of 1446 US voters, 188 said Nixon was the worst president since WWII. Three registered voters are selected at random. Find the probability that all 3 say Nixon is the worst president.
0.002
0.017
0.390
0.240
Lottery Tickets: 49% of US adults have purchase a state lottery ticket in the past year. Of these 49%, about 27.5% have an income less than $36,000/year.
Find the probability that a randomly selected adult has purchase a lottery ticket and has an income less than $36,000.
0.135
0.765
0.176
0.240
Surviving Surgery: A doctor gives a patient a 85% chance of surviving bypass surgery after a heart attack. Find the probability that a patient will not survive bypass surgery to the hundredths place.
(a)
Find the probability of tossing a coin 4 times and getting 4 heads.
Type your answer as a decimal rounded to the thousandths place.
(a)
Find the probability of selecting an ace of diamonds from a deck of 52 cards and then selecting a jack of diamonds without replacing the ace.
Type your answer as a decimal rounded to four decimal places (the ten-thousandths place).
(a)
A shipment of 250 netbooks contains 3 defective units. If a school purchases 3 of these netbooks, find the probability that the school will receive no defective units to the thousandths place.
(a)
