College of Admission Tests Multan

Averages

Solve the question of Averages and select the option from the choices A through D/E. Check your Answer and view the explanation.

Question: 1

The average of first five multiples of 3 is:
  • 8
  • 9
  • 10
  • 11

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Correct Answer: B

not available

Basic Formula: 1,2,3...n

If n is odd, the formula is (n+1/2)th term

The five multiples of 3 is 3,6,9,12,15

(n+1/2)⇒(5+1/2)th term

⇒(6/2)th term = 3rd term

Here 3rd term is 9