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The number of positive integral solution of 4x + 5y = 625 is

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in Co-ordinate geometry by (46.7k points)

The number of positive integral solution of 4x + 5y = 625 is

(A)  30

(B)  31

(C)  28

(D)  None of these 

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1 Answer

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Correct option (B) 31

From the given equation, we have

y = 625 - 4x/5

So, x should be multiple of 5, that is,

5, 10, 15, 20, 25, 30, …, 155

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