a total of 324 coins of 20 paide and 25 paise make of Rs 71. the number of 25 paise coins are
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20 paise = 0.2 rupee
25 paise = 0.25 rupee
0.2x + 0.25y = 71
x + y = 324
-0.8x - y = -284
x + y = 324
0.2x = 40
x = 200
324 - 200 = 124
25 paise = 0.25 rupee
0.2x + 0.25y = 71
x + y = 324
-0.8x - y = -284
x + y = 324
0.2x = 40
x = 200
324 - 200 = 124
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