Mathematics
NULL
Medium
Question
Replacing a 42-year-old in a group of 10 lowers the average age by 3 years. What is the new person’s age?
A
22
B
24
C
12
✓ Official correct answer
D
8
Community credibility
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A
22
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B
24
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C
12
No member explanations yet for this option.
D
8
No member explanations yet for this option.
Explanation
Total falls by 30 ⇒ new age = 42 − 30 = 12.