Concept: The question tests on the ability to solve a Word Problem

Solution:

Given 2O + 3A + 5B = 40 ... (1)

Also 3O + 5A + 9B = 64 ... (2)

To find the price of O + A + B

Multiplying the 1st equation by 1 and subtracting it from 2

2(2O + 3A + 5B) - (3O + 5A + 9B) = (2 * 40) - 64

4O + 6A + 10B - 3O - 5A - 9B = 80 - 64

O + A + B = 16

 Option A