when average age of 23 members are 0 , how many members greater than 0 ?
"average of 23 numbers = 0 . sum of 23 numbers ( 0 x 23 ) = 0 . it is quite possible that 22 of these numbers may be positive and if their sum is a then 23 rd number is ( - a ) answer is 22 ( b )"
subtract(23, const_1)