The average of 12 numbers is M and the average of 8 of these numbers is P. If the average of remaining numbers is N then which of the following options is correct?
Answer & explanation
Correct answer: option 1
Sum of 12 numbers = 12M
Sum of 8 numbers = 8P
Sum of 4 numbers = 4N
According to question ,
12M = 8P + 4N
3M = 2P + N
Hence option 1 is correct .