Quiz on Ratios and Proportions

Solution:

Given rates of the nuts are Rs.100 per kg, Rs.80 per kg and Rs.60 per kg respectively.
Nuts are to mixed in 3:4:5 ratio quantity.
Let us mix 3kg, 4kg and 5kg respectively.
Then cost of the mixture = 100 * 3 + 80 * 4 + 60 * 5 = 920
Thus cost prise of the mixture = 920
Profit to be obtained on the mixture = 50%

Selling Prise of the 12 kg of mixture= 920 + (50% of the 920)= 920 + 460 = 1380

Therefore 
Selling Prise per kg= 1380/12=115.

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