Question

a bag contains 3 red marbles, 8 blue marbles and 5 green marbles. If two marbles are drawn out of the bag, what is the probability, to the nearest 1000th. that both marbles drawn will be blue ​

Answer 1

0.233

Explanation:

There are a total of 16 marbles.

The probability the first marble is blue is 8/16.

Assuming the marble isn't replaced, the probability the second marble is blue is 7/15.

So the probability of both marbles being blue is 8/16 × 7/15 = 7/30 ≈ 0.233.