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A Group Consists of 12 Persons, of Which 3 Are Extremely Patient, Other 6 Are Extremely Honest and Rest Are Extremely Kind. a Person Form the Group is Selected at Random - Mathematics

Sum

A group consists of 12 persons, of which 3 are extremely patient, other 6 are extremely honest and rest are extremely kind. A person form the group is selected at random. Assuming that each person is equally likely to be selected, find the probability of selecting a person who is  extremely kind or honest. Which of the above you prefer more.  

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Solution

Number of persons in the group = 12
∴ Total number of outcomes = 12

Number of persons who are extremely honest = 6
Number of persons who are extremely kind = 12 − (3 + 6) = 3
∴ Number of persons who are extremely kind or honest = 6 + 3 = 9
So, the favourable number of outcomes are 9.
∴ P(selecting a person who is extremely kind or honest) =\[\frac{\text{ Favourable number of outcomes }}{\text{ Total number of outcomes }} = \frac{9}{12} = \frac{3}{4}\]

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APPEARS IN

RD Sharma Class 10 Maths
Chapter 16 Probability
Exercise 16.1 | Q 45.2 | Page 24
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