Total weight of x persons = 50 × x = 50x kg Total weight of (x – 15) women = 40 × (x – 15) = 40x – 600 kg According to the question, 50x = 40x – 600 + 35x – 600 + 50x – 1200 50x = 125x – 2400 125x – 50x = 2400 75x = 2400 x = 32
The average age of a category of 5 members is 40 years. If a person whose age is 60 years will left the group and two new persons whose age is 'a' years...
In a Company the average income of all the employees is Rs. 22000 per month. Recently the company announced an increment of Rs. 2000 per month for all t...
Average of 8 numbers is 70. If average of first four and last two numbers is 50 and 60, respectively then find the fifth number given that ratio of fift...
The average weight of 20 students is 27 kg. If two students weighing 19 kg and 47 kg are replaced by a teacher weighing 77 kg, what is the new average w...
A man takes 3.5 hours to reach a friend's house, which is 50 km away from his residence. He returns home traveling at 20 km/h. Ca...
There are three classes P, Q and R. The average marks of class P is 75. The average marks of class Q is 80. The averagemarksof class R is 85. The averag...
There are 15 numbers such that average of first 12 numbers is 35 while the average of last five numbers is 52. Find the 12th number, if the ratio betwee...
The average monthly expenditure of a family was Rs. 2,500 during the first 4 months, Rs. 2,750 during the next 5 months and 3,550 during the last 3 mont...
P spends 24% of his salary on transportation, 36% on food, 19% on children’s education and 17% on medical. He deposits the remaining amount of Rs....
There are two sections A and B of a class, consisting of 38 and 42 students, respectively. If the average weight of the students of section A is 55 kg ...
