Total number of integral solution of the...

Total number of integral solution of the system of equations `x_1 + x_2 + x_3 + x_4 + x_5 = 20` and `x_1 + x_2 = 15` when `x_k ge 0`, is

A

335

B

336

C

338

D

340

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The correct Answer is:

B

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