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  • please solve RD sharma class 12 chapter 30 Probablity Exercise very short answer question, question 5 maths textbook solution

please solve RD sharma class 12 chapter 30 Probablity Exercise very short answer question, question 5 maths textbook solution

Answers (1)

Answer : The required probability is \frac{18}{20c_{3}}

Hint:

The possible way of getting 7w by getting two 2’s and one 3’s

Given:

An ordinary cube has 4 plane faces, one face marked 2 and another face marked 3

Explanation:

Probability is given that,

Three numbers are chosen at random from 1 to 20

Total Number of cases = 18

So, the required probability =\frac{18}{20c_{3}}
Hence, the probability that they are consecutive is \frac{18}{20c_{3}}

 

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