Question

SOLVE THE 13 NO. QUESTION . *BRIEFED ANSWER ONLY*

Answer 1

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Answer 2

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Let the number of 10 rupees note is x
so number of 20 rupees note is 50 - x

ATQ,

$10 \times x + 20(50 - x) = 800 \\ 10x + 1000 - 20x = 800 \\ 10x - 20x = 800 - 1000 \\ - 10x = - 200 \\ x = \frac{ - 200}{ - 10} \\ x = 20$

So,
Number of Ten rupee notes is 20.
Number of Twenty rupee notes is (50-20).
=30

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