70 coins of 10paisa and 50paisa are kepy in a purse if the total money in the purse is rs 19 fimd the no of each type of coins
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number of 50p = x
number of 10p = 70 - x
total rupee = 19
0.5x + 0.1(70-x) = 19
0.5 + 7 - 0.1x = 19
0.4x = 19 - 7
x = 120/4 = 30
number of 50p = x 30
number of 10p = 70 - x = 40
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