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2012 AMC 10A Problem 23

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2012 AMC 10A Problem 23AMC 10 Step by Step

Name: Date: September 13, 2026

Basic Counting · difficulty 5 of 5 · about 10 min · position P21-25

Adam, Benin, Chiang, Deshawn, Esther, and Fiona have internet accounts. Some, but not all, of them are internet friends with each other, and none of them has an internet friend outside this group. Each of them has the same number of internet friends. In how many different ways can this happen?

A)
$60$
B)
$170$
C)
$290$
D)
$320$
E)
$660$

2012 AMC 10A Problem 23

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