engineering recuitment NFC Chemical Plant Operator Mock Test Quantitative Aptitude Average

Average age of A, B and C is 84 years however when D joins them, then the average comes down to 80. Now, a new person E whose age is 3 years more than D replaces A and the new average is 79 years. What is the age of A?

1

75

2

40

3

71

4

68

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