Question
The number of students (boys + girls) in class 'A' is
96, and the ratio of the number of girls to boys in class 'A' is 2:1. If the average number of boys in classes 'A' and 'B' is 78 and the average number of girls in classes 'A' and 'B' is 84, then find the total number of students in class 'B'.Solution
Number of girls in class A = (2/3) × 96 = 64
Number of boys in class A = (1/3) × 96 = 32
Number of boys in class B = 78 × 2 - 32 = 156 - 32 = 124
Number of girls in class B = 84 × 2 - 64 = 168 - 64 = 104
Total number of students in class B = 124 + 104 = 228
When a number is divided by 17 remainder is 11. Find the remainder when five times of the same number is divided by 17.
The cost of 3 notebooks and 2 erasers is Rs.47, and the cost of 5 notebooks and 4 erasers is Rs.83. What is the total price (in Rs) of 2 notebooks and 3...
What is the greatest four-digit number that leaves remainders 1, 2 and 3 respectively when divided by 2, 3 and 4?
- Determine the value of 'n' if '87n9812' is always divisible by 9.
How many unique five-digit numbers can be created using the digits 0, 1, 5, 6, 7, and 8, without repeating any digit?
If z = 3 – 4i, find |z²|.
When N is divided by 5 the remainder is 2. What is the remainder, when n³ is divided by 5?
Find the unit digit of the expression: 1! + 4! + 6! + 9! + 25!.
A number is increased by 20% then reduced by 20%. If final value is 144, find original number.
If 'N' is the greatest four digit number which when divided by 27, 6, 8 and 9 Leaves in each case the same remainder of 5, then the sum of the digits of...
Relevant for Exams:
