Qstnid -5- 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. - 23: Probability Class 8 Maths - Icse-viii-mathematics

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ICSE-VIII-Mathematics

23: Probability Class 8 Maths

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Qstn# 5 Prvs-Qstn Next-Qstn

#5
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.
Ans : (i) 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 outcome = 0
∴ P(E) = 0/3
= 0

#5-i
(a) red ball
Ans : Total number of possible outcomes = 3
∴ P(E) = 1/3

#5-ii
not a red ball
Ans : Not a red ball
Number of favourable outcomes = Green ball + Black Ball
= 1 + 1 + 2
∴ P(E) = 2/3

#5-iii
(a) white ball.
Ans : A white ball
Number of favourable outcome = 0
∴ P(E) = 0/3
= 0