Addition of Rs 36 90 is created by 180 coins which are possibly 10 paise coins or 25paise coins The ...........

Quantitative Aptitude ( CCS) Ratio, Proportion

Addition of Rs.36.90 is created by 180 coins which are possibly 10 paise coins or 25paise coins. The count of 10paise coins are

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Explanation:

-> Total count of coins = 180
If “a” is count of 10paise coins and “b” be count of 25paise coins
A + b = 180 —Eqn (i)
-> Given 10paise coins and 25paise coins create the addition = Rs. 36.90
[ (10a/100) + (25b/100) ]= 36.90
=> 10a +25b = 3690 ———(ii)
-> Solving (i) and (ii)
a10 => 10 a + 10b = 1800 (-)
=> 10a +25b = 3690
– 15b = -1890
B = 1890 / 15 = 126
Substitute b value in eqn (i) , A = 180 – 126 = 54
Therefore Count of 10paise coins = 54