Question
A 150 litres solution contains 60% juice and the rest is
water. How much water should be mixed in so that juice forms 30% of the final solution?Solution
Amount of juice in the beginning = 0.6 × 150 = 90 litres Juice quantity doesn’t change, only water is added So, new total quantity = 90 ÷ 0.30 = 300 litres Water to be added = 300 - 150 = 150 litres
Find the mean of the following observations:
45, 54, 42, 56, 46, 48, 52, 50, 57, 43There are three distinct numbers ‘m’, ‘n’ and ‘o’. If, m = 210, (m + n) = 510 and (o – n) = 60, then find the average of m, n and o.
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