Unit 01 Probability - 03 Conditional Probability Review

Question 1

Events A and B are independent. P(A) = 0.3 P(B) = 0.5. Find P(A and B)

Accepted Answer

0.15

Question 2

In an experiment chips are drawn.The results were: blue-8, red-5, pink-18, gold-9. Find P(pink)

Accepted Answer

45%

Question 3

Marbles are in a bag: 19 gold, 4 blue, 9 red. Find P(you draw gold, then your friend gold)

Accepted Answer

0.345

Question 4

Marbles are in a bag: 19 yellow, 4 blue, 9 red. Find P(you draw blue, then your friend yellow)

Accepted Answer

0.0766

Question 5

Using the table below what is the likelihood that someone who likes vanilla is an independent?

Accepted Answer

0.19

Question 6

If P(A) = 0.52, what is the compliment of A, P(A-bar)?

Accepted Answer

0.48

Question 7

Marbles in a bag: 20 blue, 40 red, 50 green and 30 gold. Which statement is false?

Accepted Answer

P(red) is < P(gold)

Question 8

In a room are 12 chairs: 3 pink , 6 blue and 3 red . Find P(you sit red then your friend red)

Accepted Answer

0.04545

Question 9

Events A and B are independent. P(A) = 0.8 and P(A and B) = 0.2. Find P(B)

Accepted Answer

0.25

Question 10

What is the probability of rolling a 4 on one 6-sided cube and a 7 on another?

Accepted Answer

0

Question 11

What is the probability of rolling two 2s on 6-sided dice?

Accepted Answer

1/36

Question 12

In a room are 12 chairs: 3 pink , 6 blue and 3 red . Find P(you sit red then your friend blue)

Accepted Answer

0.136

Question 13

In an experiment chips are drawn.The results were: blue-8, red-5, pink-18, gold-9. Find P(red)

Accepted Answer

0.125

Question 14

Using the table below what is the likelihood that a randomly selected democrat likes chocolate?

Accepted Answer

0.317

Question 15

If P(B-bar), the probability of the compliment of B, is 24%, what is P(B)?

Accepted Answer

76%

Questions 15