ans2= 15,14,13,11,10,9,7,6,5,7

 

soln:

let the anknown sum of 9 ppl =x

add up all the given sum---- it comes out to be 783+x

now the added up quantity is 9(sum of all the ages) i.e 9*integer

 

so( 783+x)/9 should be an integer and also x belongs to one of other sums so x comes out to be 90

and sum of ages =97

so each individual age can be calculated by subtracting the sum of other nine from the total.