Q. 155.0( 1 Vote )

The blood group of 30 students of a class were recorded as under:


If a students of this class is chosen at random, What is the probability that the chosen students has blood group

(i)0? (ii) A? (iii) AB?

Answer :

(i) O

Total number students= 30


Number of students with blood group ‘A’ = 9


Number of students with blood group ‘B’ = 11


Number of students with blood group ‘AB’ = 4


Number of students with blood group ‘O’ = 6


Probability P() =


(i) Probability of selecting a student with blood group ‘o’


P(B) =


(ii) Probability of selecting a student with blood group ‘A’


P(B) =


(iii) Probability of selecting a student with blood group ‘AB’


P(B) =


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