the average weight of 10 person ' s increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg . what is the weight of the new person ?
"explanation : total increase in weight = 10 ã — 2.5 = 25 if x is the weight of the new person , total increase in weight = x â ˆ ’ 65 = > 25 = x - 65 = > x = 25 + 65 = 90 answer : option d"
add(multiply(10, 2.5), 65)