Draw a Venn diagram to illustrate the information: $n\left(\xi \right)=50, n\left(A\right)=28, n\left(B\right)=20, n(A\cap B)=3$. Hence find $n\left[(\mathrm{A}\cup \mathrm{B})\text{'}\right]$.

Use Venn diagram to solve each of the following problems:

In a group of $50$ persons who speak English or Tamil or both, $37$ speak English and $30$ speak Tamil. How many speak both the languages?

Use Venn diagram to solve each of the following problems:

In a group of $50$ persons who speak English or Tamil or both, $37$ speak English and $30$ speak Tamil. How many speak only English?

Use Venn diagram to solve each of the following problems:

In a group of $50$ persons who speak English or Tamil or both, $37$ speak English and $30$ speak Tamil. How many speak only Tamil?

Use Venn diagram to solve each of the following problems:

In a group of $75$ tourists, $25$ visited only Kolkata and $23$ visited only Mumbai. How many visited Kolkata?
 

Use Venn diagram to solve each of the following problems:

In a group of $75$ tourists, $25$ visited only Kolkata and $23$ visited only Mumbai. How many visited both the places?

Use Venn diagram to solve each of the following problems:

In a class of $40$ students, $23$ play hockey and $30$ play cricket. How many play both the games ?

Use Venn diagram to solve each of the following problems:

In a group of $50$ children, $35$ like comics and $23$ like both comics and novels. How many like novels only?

Use Venn diagram to solve each of the following problems:

A survey of foreign language classes in a school showed the following:
Each student was taking at least one of the foreign languages.

$39$ students were taking French, 

$31$ students were taking German,

$38$ students were taking Spanish,

$8$ students were taking French and German.

$12$ students were taking German and Spanish,  

$14$ students were taking French and Spanish,

$5$ were taking all the three languages.

How many students were taking at least one foreign language?