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Aptitude | Progressions | Question 6

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Find Arithmetic Mean of series: 2, 2.5, 3, 3. 5, 4, 4. 5……….11 (A) 13/2 (B) 25/8 (C) 19 (D) 22/9

Answer: (A)

Explanation:

Arithmetic mean AM of the series is given by = (a1+a2+a3+…..+an)/n ……… (1) But the given series is also an AP which sum is given by = (n/2)*(a1+an) ………..(2) From equation (1),(2) we get, AM=(a1+an)/2 AM=(2+11)/2=13/2



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Last Updated : 16 Sep, 2021
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