Question : The average of runs of a cricket player of 20 innings was 32. How many runs must he make in his next innings to increase his average of runs by 4?
Option 1: 116
Option 2: 114
Option 3: 170
Option 4: 76
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Correct Answer: 116
Solution : Given: The average of runs of a cricket player of 20 innings was 32. Total runs in 20 innings $ 20 × 32 = 640$ Let his score in the 21st inning be $x$. According to the question, $(32+4)×21-640=x$ $\therefore x = 756-640 = 116$ Hence, the correct answer is 116.
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