Question

Let a sum of money is equally distributed among a group of $49$ children and each gets Rs.$20$. If the same amount is distributed among another group of children, then each child gets Rs.$7$, then the number of children in the group is

Answer 1

Let the number of children in the second group be $n$,
Since the total amount reamains same,
$49\times 20=n\times 7$
$\therefore n=140$