The blood The blood groups of 30 students of class IX are recorded as follows: A, B O, O, AB, O, A, O, B, A, O, B, A, O, O, A, AB, O, A, A, O, O, AB, B, A, O, B, A, B, O A student is selected at random from the class from blood donation. Find the probability that the blood group of the student chosen is:
(i) A        (ii)  B          (iii) AB        (iv)  O

Explanation

Total number of outcomes=`30`
(i)P(A)=`9/30=3/10=0.3`
(ii)P(B)=`6/30=2/10=0.2`
(iii)P(AB)=`3/30=1/10=0.1`
(iv)P(O)=`12/30=4/10=0.4`