question_answer 1)

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. (a) Find a probability that she read neither Hindi nor English newspapers. (b) If she reads Hidi newspaper, find the probability that she reads English newspaper. (c) If she reads English newspaper, find the probability that she reads Hindi newspaper.  

Answer:

Let H and E are the events of reading Hindi and English newspapers by the students respectively.             (a) Required probability  = P(neither H nor E)                         = 1 ? P (H or E)                               (b) Required probability = P(E/H)       (c)   Required probability = P(H/E)