Question
The number of boys and girls in a school is 120 and 200
respectively. 25% of boys left the school while 40 girls took admission in the school. Find the new ratio of boys to girls in the school.Solution
Required ratio = (0.85 x 120) : (200 + 40) = 90:240 = 3:8
Average of four numbers is 16. Sum of smallest and largest number is 48. If difference between other two numbers is 2, then find the square of second sm...
There are βxβ students in a class. Out of them βyβ are girls. The number of boys is 4 more than the number of girls. The sum of weight and the a...
- The average salary of A, B, and C is Rs. 30000 and the average salary of D and E is Rs. 25000. If the savings of A is 40% of the average salary of all five...
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...
The average of ten positive numbers is calculated as 56. On observing, it was found that two numbers 64 and 32 are wrongly interpreted as 76 and 52, res...
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...
- The average age of (x + 2) students of a class is 14 years. If the 56 years old class teacher is also included then average age of the class gets increased...
A group contains some number of members. If 2 members with an average weight of 61 kg leave the group, the average weight of the remaining members decre...
Ashish bought 25 notebooks for Rs.1230 from shop A and 12 notebooks for Rs.805 from shop B. What is the average price he paid per book?
The average of two numbers βPβ and βQβ is 480 such that they are in the ratio 5:7 respectively. Another number βRβ is 60 more than βQβ a...