Question

plzzzz help me with this question
will mark as brainliest
plz solve the second part step be step
quality answer needed!!!!!! ​

Answer 1

Answer:

8

Step-by-step explanation:

Total No . of Obs = 18

No . of Red Balls = x

Probability of Red Ball = Favourable Obs / Total No. of Obs

P(of Red Ball) = x/18

Two Red Balls Are Added

So,

No . of Red Balls = x + 2

Total no .of Balls = 18 + 2 = 20

P(of red Ball) = x + 2 / 20

P given 9 times of P obtained in A

9/8 * x/18 = (x + 2)/20

x / 16 = (x + 2)/20

(x / 16) *  20 = x + 2

5x / 4 = x + 2

5x = 4x + 8

5x - 4x = 8

x = 8

Therefore,

Initial No.Of Red Balls = 8

Hope U Understood

Mark This Brainliest If This Helped You

Answer 2

I) no. of red ball = x

total balls = 18

non red = 18-x

thus probability to get non red = 18-x/18

2) now after adding 2 balls total red balls = x+2

probability of drawing red ball in first case

= x/18

probability of getting red ball after adding 2 more balls = x+2/20

here 20 since after adding 2 balls total ball = 18+2 = 20

given condition

(x+2)/20. = 9x/8*18

= > 4x+8 = 5x

x = 8