Question

2. In a medical examination of students of a class, the following blood groups are recorded:
Blood group
A
AB
B
O
Number of Students
10
13
12
5
A student is selected at random from the class. Find the probability that he/she has blood group B.​

Answer 1

Answer:

probability of blood group B= no.of students having B group/total no.of students

=12/40=3/10

Answer 2

Answer:

probability of he / she has blood group B = 12 ÷ 30

= 2 /5