- Average of first 3 numbers is half the average of next 6 numbers. If the average of all 9 numbers is 15, find the sum of the last 6 numbers.
The average of 8 consecutive even numbers written in ascending order is 17. What is the average of the last three numbers, 36 and 53 ?
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...
The average of 10 numbers is 18. When two new numbers 'a' and 'b' are added, the average increases by 2. If a - b = 30, find the value of b.
The average weight of a group of five persons, A, B, C, D, and E is 60 kg. If another person K joins the group then the average weight of the group is d...
The ages of 4 members of a family are in the year 2011 are ‘X’,’X+6’,’X+12’ and ‘X+18’. After some years Oldest among them was dead then...
Average weight of all the people in a group is 55 kg. When two people of weight 63 kg and 77 kg left the group, average weight reduces by 1.5 kg. Find t...
In an examination, the average marks obtained by the students is 60. After correcting the quantitative mistakes, the average of 100 students is reduced ...
The income of B is 85% of A and income of C is Rs 3600 more than that of B. The average income of all three together is Rs. 8400. A and B spend 50% of t...
In an examination, the average marks obtained by the students is 75. After correcting the quantitative mistakes, the average of 100 students is reduced ...
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