Question

In a medical examination of students of a class of 40 student the following blood group were recorded :
blood group | A | AB | B | O | numberof students |15| 12 | 3 |10 |
A student is selected at rendom from the class . find the probability that the student has the blood group:
(i) AB (ii) either B or O
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Answer 1

Step-by-step explanation:

Probability of the student has blood group AB = 1/12

Probability of the student has blood group B or O = 1/10+3

= 1/13

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Answer 2

Answer:

13/40

Step-by-step explanation:

Total number of students: 40

Number of students which are blood group B or O : 13

P(E) = Favorable outcomes/total number of outcomes

= 13/40

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