Question

A bag contains 40 balls of the same shape and weight . among the balls 18 are red ,12 are yellow and rest are blue balls . what is the probability that a ball drawn at random from the bag is blue ? Probability​

Answer 1

Step-by-step explanation:

Correct option is

C

10

Let no. of red balls = x, no. of blue balls =y and no.of black balls = z.

Probability of drawing a red ball = P (red ball) =

20

11

=

40

x

⇒ x=22

Probability of drawing a blue ball = P (Blue ball) =

5

1

=

40

y

⇒ y=8

∴ No of black balls = 40- 22 -8 =10

Answer 2

the number of red balls = 18

the number of blue balls = 12

so, number of blue ball = 40-(18+12)

= 40-30

= 10

so, probability of blue ball = 10/40= 1/4

= 25%

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