The average weight of 12 crewmen in a boat is increased by $$\frac{1}{3}$$ kg, when one of the crewmen whose weight is 55 kg is replaced by a new man. What is the weight of that new man ?

The average of 20 numbers is 12. The average of the first 12 numbers is 11 and that of the next 7 numbers is 10. The last number is ?

The average of seven numbers is 18. If one of the numbers is 17 and if it is replaced by 31, then the average becomes :

The average daily income of 7 men, 11 women and 2 boys is Rs. 257.50. If the average daily income of the men is Rs. 10 more than that of women and the average daily income of the women is Rs. 10 more than that of boys the average daily income of a man is -

The average age of 11 players of a cricket team is increased by 2 months when two of them aged 18 years and 20 years are replaced by two new players. The average age of the new players is :

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