the average weight of 10 men is increased by 2 ½ kg when one of the men who weighs 58 kg is replaced by a new man . what is the weight of the new man ?
since the average has increased by 2.5 kg , the weight of the man who stepped in must be equal to 58 + 10 x 2.5 58 + 25 = 83 kg ans : ' b '
add(58, multiply(10, add(2, divide(const_1, const_2))))