Question

A bag has five red marbles, six blue marbles, and four black marbles. What is the probability of picking a blue marble, replacing it, and then picking a red marble

Answer 1

Probability = favorable event/total number of events

number of blue=6

total number of possibilities = 15

then P(blue)=6/15 = 2/5 =0.40

W replace it again (so the total number is always 15) & we draw a Red:

P(Red) = 5/15 =1/3 = 0.33