Question

$\mu$ represents the set of students in class VIII and $n\left(\mu \right)=35$. $A$ is the set of students in the class VIII who have to wear spectacles and $n\left(A\right)=18$. Draw a Venn diagram to represent the sets $\mu$, $A$ and $A^{\prime }$. .

Answer 1

$\mu \to$ the set of students in class VIII

$n\left(\mu \right)=35$.

$A\to$ the set of students in class VIII who have to wear spectacles.

$n\left(A\right)=18$

$A^{\prime }$ $\to$ the set of students in class VIII who don't wear spectacles.

$n\left(A^{\prime }\right)=n\left(\mu \right)-n\left(A\right)$

$=35-18$

$n\left(A^{\prime }\right)=17$.