A basket of fruit contains 10 bananas, five mangoes, and five apples. A fruit is selected at random. Calculate the probability of selecting an apple or a banana. Express the answer in percent form.
There are 10 + 5 + 5 = 20 total fruits in the basket. The probability of selecting an apple or a banana is the sum of the probabilities of selecting an apple and selecting a banana.
P(apple or banana) = P(apple) + P(banana)
P(apple) = 5/20 = 1/4
P(banana) = 10/20 = 1/2
Therefore,
P(apple or banana) = 1/4 + 1/2 = 3/4 = 0.75
Expressed in percent form, the probability is 75%.