In a medical examination of 40 students of a class, the following blood, groups are recorded:


Blood group



A



B



AB



O



No of students



11



15



9



5



From this class, a student is chosen at random, What is the probability that the chosen student has blood group B?

Total number students= 40


Number of students with blood group ‘A’ = 11


Number of students with blood group ‘B’ = 15


Number of students with blood group ‘AB’ = 9


Number of students with blood group ‘O’ = 5


Probability P() =


Probability of selecting a student with blood group ‘B’


P(B) = = =

14