Question

Suppose you choose a marble from a bag containing 2 red marbles, 2 white marbles and 6 blue marbles. You return the first marble to the bag and choose again. Find p (red then blue)

A.4/5
B.6/5
C.3/25
D.2/5

Answer 1

3/25

Explanation:

There are 10 marbles in the bag, all equally likely to be chosen.

P(red) = 2/10 = 1/5

P(blue) = 6/10 = 3/5

Multiply these (red then (and) blue) = 1/5 x 3/5 = 3/25