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If x + y = 15 then ( x - 10 )^(3) + ( y...

If ` x + y = 15 then ( x - 10 )^(3) + ( y - 5)^(3)` is

A

(A) 25

B

(B) 125

C

(C) 625

D

(D)0

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The correct Answer is:
D
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8x + 5y = 9 , kx + 10 y = 15 .

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