5. The average of first five multiples of 3 is :
B.10
C.8
D.11
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Answer – (A)
Explanation:
Basic Formula:
1, 2, 3 ..… n
If n is odd, the formula is (n+12)th term
The five multiples of 3 is 3, 6, 9, 12, 15
(n+12) => (5+12)th term
=> 62 th term =3rd term
Here 3rd term is 9
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