Question
The ratio of number of boys and girls in a factory of
600 workers is 7:3. How many more girls should be joined to make the ratio 1:1?Solution
Number of boys = (600 × 7/10) = 420 Number of girls = (600 - 420) = 180 ∴    Number of girls to be joined = (420 - 180) = 240
The average of n numbers is 64. If each of 56% of the numbers is increased by 15 and each of the remaining numbers is decreased by 10, then the n...
The average weight of 8 people is 75 kg. When three new people with their weights in the ratio 3:4:5 joined the group, the average weight of all the peo...
Average age of company A is 25 years and average age of both companies A and B is 17 years. If the ratio of number of employees in company A and B is 3:...
- The average of 36 numbers is 75. If every number is multiplied by 9, what will be the average of the resulting numbers?
The average age of A and B is 15 years. If A is to be replaced by C, the average would be 14 years. The average age of C and A is 16 years. Find the age...
Average of 20 numbers is 90. Average of first 8 numbers is 125 while average of last nine numbers is 40. If ninth number is 25% less than the tenth numb...
Average of four numbers is 21. Sum of smallest and largest number is 53. If difference between other two numbers is 1, then find the square of second sm...
Average of 15 observations calculated by a student was 65 but when he again went through his observations he realised that he took value of three observ...
The mean of 7 consecutive natural numbers is 68. What is the addition of the minimum and maximum numbers?
In a class of 40 students, the average weight of the boys is 48 kg, and the average weight of the girls is 56 kg. If the overall average weight of the c...
Relevant for Exams:
