Question

in a class 30%students like tea 20%like coffee and 10%like both tea and coffee a student is selected at random what is the probability that he does not like tea if it is known that he he like coffee

Answer 1

Let the class contain 100 students

20/100

1/5 is the answer

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Answer 2

               

          no .of favourable outcomes/total no. of outcomes  

              20/60 =1/3