Question

in the weight of number 1, 2, 3, 4, 5, 7, 9, 11, 12, percent of the number
(a)even number

Answer 1

in the calculation of the given question understand that its and perfectly even number

Answer 2

(1+2+3+4+5+7+9+11+12)/9 = 54/ 9 = 6 which is even number. Hope it helps you