Question

A bag contains 3 red marbles and 4 blue marbles. Two marbles are drawn at random

without replacement.
If the first marble drawn is blue, what is the probability the second marble is also blue?

Answer 1

50%

Explanation:

In the bag there are left 6 marbles: 3 red marbles + 3 blue marbles

Chances to get a blue marble = 3/6 = 0.5 = 50%