The ratio indicates that the groups in the basket occur in 2 + 3 + 5, for a total of 10 in each group. To find the number of groups, divide 150 by 10.
150/10 = 15
Each one of the 15 groups of fruit has 5 bananas. Multiply 15 x 5.
15 x 5 = 75
There are 75 bananas in the basket.