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A bag contains 3 white, 5 black and 2 red balls, all of the same shape and size. A ball is drawn from the bag without looking into it, find the probability that the ball drawn  a black ball. - Mathematics

A bag contains 3 white, 5 black and 2 red balls, all of the same shape and size. A ball is drawn from the bag without looking into it, find the probability that the ball drawn 

a black ball.

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Solution

Total number of ball3+5+2=10 

Total number of events =p(n)=10  

(1) There are 5 black balls 

favourable number of events =p(A) =5 

Hence, p(getting a black ball)=`(P(A))/(P(n))=5/10=1/2` 

Concept: Sample Space
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APPEARS IN

Selina Concise Maths Class 10 ICSE
Chapter 25 Probability
Exercise 25 (A) | Q 2.1 | Page 386
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