Question

A,B,C were three friends measured their weights two at a time .If the measurement were 100 kg 120 kg and 140 kg what is their average weight

Answer 1

Answer:

60

Explanation:

let A+B = 100

B+C = 120

A+C =140

or, 2 ( A+B+C) =360

or, A+B+C = 180

or, average weight = 180/3 = 60