conditional probability 2

Question 1

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 2

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 3

There are 12 chairs: 3 pink 6 blue and 3 red . Find P(you sit red given your friend sat blue)

Accepted Answer

3/11

Question 4

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

Accepted Answer

18/31

Question 5

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

Accepted Answer

0.15

Question 6

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

Accepted Answer

1/36

Question 7

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 8

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 9

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

Accepted Answer

45%

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

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

Accepted Answer

P(red) is < P(gold)

Questions 11