at a birthday party, each child gives a gift to the rest.there were 342 gifts distributed at the party. Find the no. of children at the party
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Answer:
Let there are N children,then each of them will give (N-1) gifts,(each children will not gift himself)
Total gifts =N*(N-1) =N^2 -N
N^2 -N =132
N^2 -N -132 =0
(N-12)(N+11) =0
N = 12 ,-11
as number of children can not be negative,
so number of children =12
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Answered by
0
Answer:
Let there are N children,then each of them will give (N-1) gifts,(each children will not gift himself)
Total gifts =N*(N-1) =N^2 -N
N^2 -N =132
N^2 -N -132 =0
(N-12)(N+11) =0
N = 12 ,-11
as number of children can not be negative,
so number of children =12
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