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The average of four numbers A, B, C, and...

The average of four numbers A, B, C, and D is 40. The average of four numbers A, B, E and F is also 40 (A, B are common). Which of the following must be true?

A

(A+B) `ne` (C+D)

B

(C+D) =(E+F)

C

Either C=E or F and D=F or E

D

C=E and D=F

Text Solution

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The correct Answer is:
B
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