# 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 is Drawn Is: a Black Ball. - Mathematics

Sum

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 is drawn is:

a black ball.

#### Solution

In a bag, 3 balls are white
2 balls are red
5 balls are black
Total number of balls = 3 + 2 + 5 = 10

Number of possible outcomes of one black ball = 10

and the number of favourable outcomes of one black ball = 5

∴ P(E) = "Number of favourable outcomes"/"Number of all possible outcome"

= 5/10 = 1/2

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

Selina Concise Mathematics Class 8 ICSE
Chapter 23 Probability
Exercise 23 | Q 7.1 | Page 259