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AFCAT I 2012 Solved Paper
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© examsnet.com
Question : 68
Total: 100
If the sum of a few numbers is 450 and their mean is 50 and if another number 100 is included, the mean would become
55
60
75
150
Validate
Solution:
50
=
Sum of all numbers
number of observations
50
=
450
Number of observations
Number of observations =
=
450
50
=
9
New mean
=
450
+
100
10
=
550
10
=
55
© examsnet.com
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