Question

A bag contains 7 red marbles, 8 blue marbles and 4 green marbles. If three marbles

are drawn out of the bag, what is the probability, to the nearest 100oth, that all three
marbles drawn will be blue?

Answer 1

Explanation:

A bag contains 8 red marbles, 3 blue marbles and 7 green marbles.

Total = 18 marbles.

Probability of drawing three red marbles = probability of drawing one red without replacement + probab of drawing another without reeplacement + probab of drawing a third without replacement.

Probability of drawing three red marbles = 8/18 + 7/17 + 6/16 = 0.4444 + 0.4118 + 0.3750 = 1.2312.