Calculate Q_{ 1 } and Q_{ 3 } from the following data
![](https://ask.learncbse.in/uploads/db3785/original/2X/f/f45abacdea54b052246c2c38a4e981bf4763f674.png)
Calculation of Q_{ 1 } and Q_{ 3 }
Now, Q_{ 1 }= Size of (N+1/4) th item = Size of (51+1/4) th item
= Size of 13th item and it lies in cf 14, hence Q_{ 1 } = 20 marks
Q_{ 3 }= Size of 3(N+1/4) th item = Size of 3 (51+1/4) th item
= Size of 39th item and it lies in cf 42, hence Q_{ 3 } = 40 marks