Question

A bag contains eight marbles of equal size and weight. One marble is red, two marbles are white, and five marbles are blue. A marble is taken from the bag two times. Each time a marble is taken out, it is not replaced. What is the probability of picking a blue marble both times?

Answer 1

There are 5 blue marbles out of 8.

The first pick would be 5/8

After picking the first marble, there would be 4 blue and 7 marbles.

The second pick would be 4/7.

Picking blue both times would be 5/8 x 4/7 = 5/14