Question
The average weight of 7 boxes P, Q, R, S, T, U and V is
72kg. Another box A is added to group and the average now becomes 70kg. If another box C whose weight is 8 kg more than that of box A, replaces box P, then the average weight of Q, R, S, T, U, V, A and C becomes 69kg. Find the weight of box P?Solution
(P + Q + R + S + T + U + V) = 7 × 72 = 504 kg (P + Q + R + S + T + U + V + A) = 8 × 70 = 560 kg A = 560 – 504 = 56 kg C = 56 + 8 = 64 kg (Q + R + S + T + U + V + A + C) = 8 × 69 = 552 kg Q + R + S + T + U + V + 56 + 64 = 552 Q + R + S + T + U + V = 552 – 56 – 64 = 432 P = 504 – 432 = 72 Kg
The average number of books sold by Viren in first 5 months is 3500 and in first 6 months is 4300. If the number of books sold by him in 7th ...
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...
The average of 41 consecutive odd numbers is 49. What is the largest number.
Average marks scored by each boy in a class were 90, whereas that by each girl were 100. If the number of boys is 50% more than the number of girls, the...
- What is the average of the squares of the first 11 natural numbers?
10.5, 19, 40, 82, 166, 334
The average expenditure of a man for the first seven month is Rs.12000 and for the next five months is Rs.9000. If he saves 15000 in that year then find...
The average weight of a group of 30 employees is 65 kg. If an additional five employees, each with an average weight of 72 kg, are added to the group, w...
The average of two numbers is 6 more than the smaller number among them. If the greater number is 100% more than the smaller number, then find the sum o...
In a classroom, the average score of 15 students on a test is 44 points. If 5 new students, each with an average score of 'x' points, join the class, an...
Relevant for Exams:
