. A box contains five blue, eight green, and three yellow marbles. If a marble is selected at random, what is the probability that it is not blue?
(16-5)/16 = ?
To find the probability of selecting a non-blue marble, we first need to determine the total number of marbles in the box that are not blue.
The box contains 5 blue marbles, 8 green marbles, and 3 yellow marbles. Therefore, the total number of marbles in the box is:
5 blue + 8 green + 3 yellow = 16 marbles
Out of the 16 marbles, we can see that 5 of them are blue. This means that the remaining marbles, which are green and yellow, are not blue.
Therefore, the total number of non-blue marbles in the box is:
8 green + 3 yellow = 11 marbles
To calculate the probability of selecting a non-blue marble, we divide the number of non-blue marbles by the total number of marbles in the box:
Probability = Number of non-blue marbles / Total number of marbles
Probability = 11 / 16
Simplifying the fraction, we get:
Probability = 11/16
Therefore, the probability of selecting a marble that is not blue is 11/16.