Question

In group of children, each child gives 2 gifts to every other child. The total number of gifts is 264. Find the number of children in the group. Guys pls answer fast!! I need the answer urgently!!

Answer 1

Answer:

Step-by-step explanation:

Let n be the number of children

Number of gifts per children = n-1 (Since no one will gift himself of herself)

Total number of gifts = no. of children × no. of gift(s)per children

Since we are given that he no. gifts are 132

So,

132 = n(n-1)

⇒132 = n²-n

⇒n²-n-132=0

⇒n²-12n+11n-132=0

⇒(n-12)(n+11)=0

⇒n= 12,-11

Since number of children can not be negative.

So, number of children is 12.

hope this helps u :-)