The average height of a circus troupe was 69 inches. A dwarf who is just 38 inches and a tall man
stands 80 inches tall joined them, bringing average height down by two inches. What is the
present strength of the troupe?
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Answer:
let the no of people =n
avg =69
sum=69×n
new sum= 69n +38+80
new avg = 69-2=67
69n+118
_______= 67
n+2
69n+118 = 67n + 134
2n= 134 - 118 = 16
n=8
present strength =8+2=10
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