SOLUTION: Each member of a club writes greeting cards to other members.the total no of greeting cards is 110. find the no of members.?

Question 1052554: Each member of a club writes greeting cards to other members.the total no of greeting cards is 110. find the no of members.?
Answer by ikleyn(52794) (Show Source): You can put this solution on YOUR website!
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Each member of a club writes greeting cards to other members.the total no of greeting cards is 110. find the no of members.?
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Let the number of members be "n", where n is an integer now unknown.

Then each member writes to (n-1) others.

Hence, the total number of greeting cards is n*(n-1).

The equation is

n*(n-1) = 110.

The solution is n = 11.

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