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Please help with this question

The mean (average) of four whole numbers is 16. The mean of three of them is 14.
The remaining number must be
A 2
B 15
C 22
D 30

This is fron sample paper of LANCASTER ROYAL GRAMMAR SCHOOL.

Thanks

henna025 wrote:Please help with this question

The mean (average) of four whole numbers is 16. The mean of three of them is 14.
The remaining number must be
A 2
B 15
C 22
D 30

This is fron sample paper of LANCASTER ROYAL GRAMMAR SCHOOL.

Thanks

If the mean of 4 numbers is 16 then the total = 64
if the mean of 3 numbers is 14 then the total is 42

so remaining number is 22 i e how much do you have to add to get a mean of 16.

Thanks a lot