Question 413179
The total of the ages increased by 30 (64 - 34)
Avg = total age/# of members
Avg = ages/m  (ages is the sum of all members)
Avg + 2 = (ages + 30)/m
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Avg*m = ages
(Avg+2)*m = ages + 30
Avg*m + 2m = ages + 30
ages + 2m = ages + 30
2m = 30
m = 15 members
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This is not as simple a problem as it first seems.