Discussion

Explanation:

Average runs scored till N^th over is 7.43.

∴ Total runs scored in N overs = N × 7.43.

It would be best to check the options for the value of N such that N × 7.43 should be an integer.
This is possible for option (a) i.e., 7 and option (c) i.e., 14.

Now, the runrate at the end of N + 6 overs is 8.08. Checking for N = 7 or 14 such that (N + 6) × 8.08 should be an integer.
N = 7 is the only option satisfying.

⇒ N = 7

Runs scored after:
5^th over: 5 × 8 = 40
7^th over: 7 × 7.43 = 52
9^th over: 9 × 8.11 = 73
11^th over: 11 × 8.45 = 93
13^th over: 13 × 8.08 = 105

Hence, option (a).

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