The average income of A, B and C is Rs. 12,000 per month and average income of B, C and D is Rs. 15,000 per month. If th…

The average marks obtained by 22 candidate in an examination are 45. The average marks of the first 10 candidates is 55…

The average of 11 results is 60. If the average of first six results is 58 and that of last six is 63, find the 6<sup…

The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and th…

A man has 'n' magical eggs whose average weight is 'k' gm. Each of the 'n' eggs produces 'n' eggs next day such that the…

In a group of 120 people, one-fifth are men, one-fourth are women and the rest children. The average age of women is fiv…

The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean scor…

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 :