Question

A bag contains 12 balls out of which some balls are white. If one ball is drawn at random, then the probability of white ball is
noticed. If 6 more white balls are added in that bag, the probability of drawing a white ball is twice the probability of previous one.
Find the number of white balls.
a)5
b)3
c)4
d)6

Answer 1

Answer:

☆x=3

Step-by-step explanation:

total no.of balls in the bag=12

no.of white balls=x

p(white balls)=no.of favorable outcomes/no.of total possible outcomes=x/12

If 6 more white balls are added in that bag, the probability of drawing a white ball is twice the probability of previous one

p(white balls)=no.of favorable outcomes/no.of total possible outcomes

total no.of balls=12+6=18

total no.of white balls=x+6

p(white balls)=x+6/18=2x/12

x+6/3=2x/2

6x=2x+12

4x=12

x=3

☆total no.of white balls=3

Hope it helps you.

Please mark it as brainlist.

Answer 2

Answer:

the no. of white balls are 3

Step-by-step explanation:

If the number of white balls are 3.

then,

the probability is

= 3/12

=1/4.

and .

If 6 white balls are added.

the p(E) =

9/18

=1/2.

so.we came to know that ,if we add 6 white balls the probability is twice.

1/4 twice become 1/2 .

✍thank u ...