Solution:
We can let the two numbers be a and b, and we need to find ab. We can create the equations:
a + b = 6
and
1/a + 1/b = 15/8
Simplifying the second equation, we have:
b/ab + a/ab = 15/8
(b + a)/ab = 15/8
Since b + a = a + b = 6, we have:
6/ab = 15/8
15ab = 48
ab = 48/15 = 16/5
Answer: C
