Login
Register
- Mocks
- Previous Papers
- Learn
- Practice
- Colleges
- Courses
- Enroll To CAT 2024
- Offers
- Other Exams
- Blogs
- Adda
The average of nine numbers is M and the average of three of these is P. If the average of remaining numbers is N, then
This can be solved easily by using allegations
$$p=\frac{\left(p1q1+p2q2\right)}{q1+q2}$$
Here p = M , p1=P , p2=N
           q1=3 , q2=6
$$\ \therefore\ M=\frac{\left(3P+6N\right)}{3+6}$$
On solving 3M = P+2N
Create a FREE account and get:
Quick, easy and effective revision
