Question

14. In a medical examination of students of a class, the following blood-groups are recorded:
Blood group
Number of students
A
10
B
13
AB
12
O
5
A student is selected at random from the class. What is the probability that he/she has blood
[NCERT Exemplar]
group B?​

Answer 1

Probability =

$\frac{favourable \: outcomes}{total \: number}$

p(getting a blood group B)=

$\frac{13}{40}$

therefore probability =

$\frac{13}{40}$

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