Question
6 boys and 8 girls can do a piece of work in 12 days. 7
boys and 11 girls can do the same piece of work in 10 days. In how many days can 2 boys and 6 girls complete the same piece of work, working together?Solution
- In a team, the ratio of male to female players is 4:1. The average score of male players is (x + 2), and the average score of the whole team is (x + 1). Fi...
What is the average of odd numbers greater than 10 but less than 30?
Determine the value of a − b given that a + 3b = 18a and 3a + b = 30 .
The average number of sweets distributed in a class of 90 students is 6. If lsquo;xrsquo; number of students newly joined the class and the average beco...
The ratio of the present ages of P and Q is 7:4 respectively. If the age of P 13 years hence from now will be 125% more than the age of Q 4 years ago fr...
The average age of 26 children and their teacher's age are 22 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
- During a week, the first six days recorded an average rainfall of 140 cm, and the last six days had an average of 148 cm. Given that the weekly average was...
A number is such that when it is multiplied by 4, it gives another number which is as much above from 180 as the original number (itself) is below 180. ...
The average number of books on history, polity and geography in a library is 144, and the average number of books on history and geography is 140. If th...
The average age of 30 students in a class is 18 years. The average age of another 20 students is 22 years. Find the average age of all the 50 students t...
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