Question
A trader combines 12 kg of sugar at Rs. 3 per kg with 3
kg at Rs. 15 per kg. What is the cost price (in Rs.) of the mixture per kg?Solution
Required cost price = (3 × 12 + 15 × 3) ÷ (12 + 3) = (81 / 15) = Rs. 5.4
If the first quartile of data set 8,10,8,7,9 is 7.5, then the value of quartile deviation is
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