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# A Bag Contains a Black Ball, a Red Ball and a Green Ball, All the Balls Are Identical in Shape and Size. a Ball is Drawn from the Bag Without Looking into It. What is the Probability - Mathematics

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A bag contains a black ball, a red ball and a green ball, all the balls are identical in shape and size. A ball is drawn from the bag without looking into it. What is the probability that the ball drawn is:
(i) a red ball
(ii) not a red ball
(iii) a white ball.

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#### Solution

Total number of possible outcomes = 3

∴ P(E) = 1/3

(ii)

Not a red ball

Number of favourable outcomes

= Green ball + Black ball

= 1 + 1 + 2

∴ P(E) = 2/3

(iii)

A white ball

Number of favourable outcomes = 0

∴ P(E) = 0/3 = 0

Concept: Basic Ideas of Probability
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#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 23 Probability
Exercise 23 | Q 5 | Page 258
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