To find the probability of selecting an apple or a banana from the basket of fruits, we first need to determine the total number of fruits in the basket.
Total number of fruits = Number of bananas + Number of mangoes + Number of apples = 10 (bananas) + 5 (mangoes) + 5 (apples) = 20 fruits
Next, we calculate the number of favorable outcomes, which in this case would be the number of apples plus the number of bananas.
Favorable outcomes = Number of apples + Number of bananas = 5 (apples) + 10 (bananas) = 15 fruits
Now, we can calculate the probability of selecting an apple or a banana:
Probability (apple or banana) = (Number of favorable outcomes) / (Total number of fruits) = 15 / 20 = 0.75
To express this probability in percent form, we multiply by 100:
Probability in percent = 0.75 * 100 = 75%
Thus, the answer is 75%.