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In a group of 450 people, 300 can speak ...

In a group of 450 people, 300 can speak Hindi and 250 can speak English. How many people can speak both Hindi and English ?

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Let H =The set of people who can speak Hindi
E = The set of people who can speak English.
According to the question we have `|H uu E|=450,|H|=300,|E|=250
We want to find `|H nn E}`
`|HnnE|=|H|+|E|-|H uu E|=300+250-450=100`
`:. 100` people can speak both Hindi and English.
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