Question 23
A man bought 20 cows in ₹2,00,000. If the average cost of 12 cows is ₹12500, then the average cost of remaining cows will be?
Solution
Let the average cost of remaining 8 cows is x. It is given that the cost of all 20 cows is 2,00,000. And average of 12 cows 12,500. The cost of these cows is 12*12500=1,50,000.
The cost of remaining 8 cows is 8x.
So, 2,00,000 = 1,50,000 + 8x
$$\Rightarrow$$ 8x = 50,000
$$\Rightarrow$$ x = 6250
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