The mean of a set of 15 numbers is 40. If the mean of the initial 5 numbers in this set is represented by the expression (12x + 10), and the mean of the...
Average weight of a group of ‘x’ people increased by 1.5 kg, when a person weighing 56 kg joined the group while the average weight increased by 2 k...
There are 4 numbers – A, B, C & D. B is 25% more than A and D is equal to average of A & C. Ratio of A to C is 3 : 4 and C is 5 more than B. Find valu...
Average weight of 36 students is 68 kg. When two new students with weights (m + 12) kg and (m - 6) kg join, the average weight becomes 69 kg. Find the v...
The average of four numbers is 68. When four more numbers are included, the average increases by 6. Find the average of the numbers included.
- The average of the first three numbers is twice the average of the next six numbers. If the average of all nine numbers is 20, then find the sum of the las...
The average of twelve numbers is 45.5. The average of the first four numbers is 41.5 and that of the next five numbers is 48. The 10th number...
A worker completes 6 tasks at an average rate of 5 tasks per day. If he needs to complete an average of 8 tasks per day over 12 days, what should be his...
The average weight of a group of five persons, A, B, C, D, and E is 67 kg. If another person K joins the group then the average weight of the group is d...
A bowler gives 15 runs per wicket. He gives 30 runs and takes 5 wickets in a last match after which his average becomes 13.5 runs per wicket. How many w...
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