Question

A box contains 7 red marbles, 5 white marbles, and 3 blue marbles. If a marble is randomly selected from the box, what is the probability that it is white? Express your answer as a fraction or a decimal number rounded to three decimal places, if necessary.

Answer 1

1/3 or 0.333

Explanation:

There are 7 + 3 + 5 = 15 marbles in the box altogether, and 5 white marbles. The probability of selecting a white marble is 5/15 which is 1/3 which is 0.3333333333333333333333333... which rounds to 0.333 in three decimal places.