How many kilograms of wheat at Rs 42 per kg be mixed with 25 kg of wheat at Rs 24 per kg so that on ...........

Quantitative Aptitude ( CCS) Mixture and Alligation

How many kilograms of wheat at Rs 42 per kg be mixed with 25 kg of wheat at Rs 24 per kg so that on selling the mixture at Rs 40 per kg, there is a gain of 25%?

24 kg

20 kg

42 kg

36 kg

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Explanation:

Let x kg of wheat at Rs 42 per kg be mixed
SP = 40, gain% = 25%, so CP = (100/125) * 40 = Rs 32
So
1st wheat(x kg) 2nd wheat(25 kg)
42 24
. 32
8 10
So 8/10 = x/25
Solve, x = 20