Question

a bag contains 50p,25p and 10p coins in the ratio 5:9:4 amounting to rs 206 find the number of coins for each kind

Answer 1

↑ Here is your answer ↓
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$50p = 0.5r$

$25p = 0.25r$

$10p = 0.1r$

Now,

The ratios are 5x, 9x and 4x respectively,

$0.5*5x + 0.25*9x + 0.1*4x = 206$

$2.5x + 2.25x + 0.4x = 206$

$5.15x = 206$

$x = 206/5.15$

$x = 40$

Now each kind of coin,

50p = $5x = 5*40 = 200$

25p = $9x = 9*40 = 360$

10p = $4x = 4*40 = 160$

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Glad to help you.
@EmadAhamed