Math, asked by valli797, 3 months ago

31. A bag contains 31 balls out of which x are red. A ball is drawn at random from the bag.

Find the probability that it is

i red ii. not red.

Answers

Answered by geeta387001
0

Answer:

bag contains =18 balls

no. of red balls =x

Probability of red ball =total no of ballFavourable ball

(i) P[red ball]=18x

(ii) If two more red ball add 

no. of red ball =x+2

total no. of balls =18+2=20

Probability of druuing red ball =89 Probability of red ball coming in part (i)

∴ 20x+2=89×18x

∴ 20x+2=16x

∴ 16(x+2)=20 x

∴ 16 x+32=20 x

∴ 20 x−16 x=32

∴ 4 x=32

∴ x=8

→ the value of x=8

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