Question

Pls answer fast plssss

Answer 1

Number of green balls = 12 .
n(G ) = 12 .

Number of Black balls = x.
n(B ) = x.

Total number of balls = 12 + x.

Now, P(B) = x /( 12 + x)

Given that 2 Red balls are added to the bag removing 2 black ones.

n(R ) = 2 .
n(B) = x - 2

Now, P' ( B) = x - 2 /(12 + x) .

Given that,

x-2/12+x = 2/3 ( x / 12 + x)

=> x - 2 = 2/3 ( x)

=> x - 2/3x = 2

=> 1/3x = 2

=> x = 6 .

Therefore value of x = 6 .