Question

If 95C - 380A = 456, and 475A + 95B = 969, then what is the average of A, B and C?

Answer 1

Answer:

95C-380A=456

and, 475A+95B=969

Add those two equations and get

95A+95B+95C=1425

or, A+B+C=1425/95=15

or, the average is 15/3=5.