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The average of marks obtained by A and B is 15 less than that of average marks obtained by B and C. If the marks obtained by C is 65, what is the marks obtained by A?

The average of marks obtained by A and B is 15 less than that of average marks obtained by B and C. If the marks obtained by C is 65, what is the marks obtained by A? Correct Answer 35

According to given information we have,

(A + B)/2 = (B + C)/2 - 15

A/2 = C/2 - 15

C = 65,

∴ A = 35

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