The average of twelve numbers is M and the average of four of these is P. If…
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The average of twelve numbers is M and the average of four of these is P. If the average of remaining numbers is N, then :
- A.
3M = 2N + P
- B.
2M = N + P
- C.
M = N + P
- D.
3M = 2P + N
Attempted by 24 students.
Show answer & explanation
Correct answer: A
Ans: 3M = 2N + P
Total of 12 numbers = Total of 4 numbers + Total of remaining 8 numbers.
=> 12M = 4P + 8N
=> 3M = P + 2N