Question

The denominator of two numbers a and b is 20, the denominator of b and c is 19, and the denominator of a is 21, then the value of a will be​

Answer 1

Answer:

A + B = 2 * 20 = 40

B + C = 2 * 38 = 76

C + A = 2 * 21 = 42

2 ( A + B + C ) = 40 + 38 + 42 = 120

A + B + C = 60

A =  ( A + B + C ) - ( B + C )

= 60 - 38 = 22

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