Describe them Widely in details

4) In a class of 180 students, all of whom took English and History, 15 failed History, 10 failed English and 5 failed both. a) Find the probability that a student chosen at random failed History and passed English. b) What is the conditional probability that a student, who passed English, also passed History? 5) A group of 20 boys went on a picnic. 5 got fire burnt, 8 got bitten by mosquitoes and 10 returned home safely without any mishap. What is the probability that a) A boy, who got fire burnt, was ignored by the mosquitoes? b) A mosquito bitten boy also got re burnt