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Average
Q1.
The arithmetic mean of 25 real numbers is 110. If 10 numbers are increased by 12.5 each, another 10 numbers are increased by 15 each and the remaining 5 numbers are unaltered, then the new value of the arithmetic mean is:
Q2.
A group of people consists of men, women and children. Among them, 20% are men, 50% are women and the rest are children, and their average weights are 45 kg, 60 kg and 20 kg, respectively. The average weight (in kg) of the group is:
Q3.
Calculate the average of the first 10 natural numbers.