A batsman scores 35, 45, 38, 42, and x runs in five innings. If his average score for the five innings is 40, what is the value of x?
Answer: B
The mean (average) score is the total score divided by the number of innings.
Total score = 35 + 45 + 38 + 42 + x = 160 + x.
Average = \(\frac{160 + x}{5} = 40\).
160 + x = 40 × 5 = 200.
x = 200 - 160 = 40.