Why was Raziya worried when she read the newspaper?

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Solution

Raziya read a news item about sewage water getting mixed with the water in the drinking water pipes, thereby contaminating the drinking water in the area. Raziya was worried because consumption of contaminated water leads to various health diseases such as cholera, diarrhoea, etc.

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Q. In a hostel, 60% of the students read Hindi newspaper, 40%read English newspaper and 20% read both Hindi and English newspapers. A student is selected at random:
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Garima was reading the newspaper when she suddenly saw the following poster which had won the first prize in an event.

The event was most probably organised on:

In a hostel, 60% of the students read Hindi newspaper 40% read English newspaper and 20% read both read both Hindi and English newspapers. A student is selected at random
IF he/she reads Hindi newspaper, find the probability that she reads English newspaper.

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