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Question
The mean of 25 numbers is 14. If 3 is added to every number, what will be the new mean?
Options
14
15
17
18
MCQ
Solution
17
Explanation:
Mean of 25 numbers = 14
∴ Sum of 25 numbers = 25 × 14 = 350
Now, 3 is added to every number
So, total number added = 25 × 3 = 75
∴ Sum of total numbers = 350 + 75 = 425
∴ New mean = `425/25` = 17
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Statistics (Entrance Exam)
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