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AFCAT I 2012 Solved Paper
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© examsnet.com
Question : 67
Total: 100
The average of first 80 natural numbers is
40
41
40.5
142
Validate
Solution:
Average
=
(
n
)
(
n
+
1
)
(
2
)
×
n
Where ‘n’ be the natural number
Therefore, average =
80
×
(
80
+
1
)
2
×
80
=
81
2
=
40.5
© examsnet.com
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