The average of 5 numbers is 6. The average of first two numbers is 3. The…
2016
The average of 5 numbers is 6. The average of first two numbers is 3. The average of last two numbers is 9. Third number is?
Answer: A. 6 — Average of 5 numbers is 6, so their total is 30. Average of the first two is 3, so their total is 6. Average of the last two is 9, so their total is 18. Third…
- A.
6
- B.
9
- C.
7
- D.
8
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Correct answer: A
Average of 5 numbers is 6, so their total is 30.
Average of the first two is 3, so their total is 6.
Average of the last two is 9, so their total is 18.
Third number = 30 - 6 - 18 = 6.
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