11.
The average of odd numbers up to 100 is

12.
In a group of 120 people, one-fifth are men, one-fourth are women and the rest children. The average age of women is five-sixth of the average age of men. Average age of children is one-fourth of the average age of men. If average age of men is 60 years, what is the average age of the group?

13.
The average of ten numbers is 7. If each number is multiplied by 12, then the average of the new set of numbers is :

14.
The mean temperature of Monday to Wednesday was 37°C and of and of Tuesday to Thursday was 34°C. If the temperature on Thursday was $$\frac{4}{5}$$ that of Monday, the temperature of Thursday was-

15.
The average weight of three boys A, B and C is $$54\frac{1}{3}$$ kg, while the average weight of B, D and E is 53 kg. What is the average weight of A, B, C, D and E?

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