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प्रश्न
If the arithmetic mean of seventy-five numbers is calculated, it is 35. If each number is increased by 5, then mean of new numbers is:
पर्याय
30
40
70
90
MCQ
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उत्तर
40
Explanation:
A.M. of 75 numbers = 35
Sum of 75 numbers = (75 × 35) = 2625
Total increase = (75 × 5) = 375
Increased sum = (2625 + 375) = 3000
Increased average = `3000/75` = 40
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