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In a class, 30% students fail in English, 20% students fail in Hindi and 10% students fail in both English and Hindi. A student is chosen at random, then what is the probability he fail in English, if he has failed in Hindi?

In a committee, 50 people speak Hindi, 20 speak English and 10 speak both Hindi and English . How many speak at least one of these two languages ?

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Samira sells newspapers at Janpath crossing daily.On a particular day,she had 312 newspapers out of which 216 are in English and remaining in Hindi.Find the ratio of(a) the number of English newspapers to the number of Hindi newspaper.(b) the number of Hindi newspapers to the total number of newspapers

Samira sells newspapers at Janpath crossing daily. On a particular day, she had 312 newspapers out of which 216 are in English and remaining in Hindi. Find the ratio of the number of Hindi newspapers to the total number of newspapers.

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In a class, 30% students study English, 15% study Hindi and 10% study both English and Hindi. One student is selected at random. Find the probability that (i) He studies English if it known that he Hindi (ii) He studies Hindi if it is known that he studies English

Out of 15 persons 10 can speak Hindi and 8 can speak English.If two persons are chosen at random,then the probability that one peron speaks Hindi only and the other speaks both Hindi and English is