Question

A bag contains 15 white and 25 green beads. How many more white beads are to be put in to the box to make the probability of getting green beads is 1/2. ​

Answer 1

Answer:

45

Step-by-step explanation:

Number of white balls =15

Let number of black balls =x

Total number of outcomes =15+x

P

1

= Probability of getting white ball =

15+x

15

P

2

= Probability of getting black ball =

15+x

x

As per question

P

2

=3P

1

⇒

15+x

x

=3×

15+x

15

⇒

15+x

x

=

15+x

45

∴x=45

Hence number of black balls is 45.

Answer 2

Answer:

10

Step-by-step explanation:

total outcomes =15+25=40

at this situation probability of getting green

=25/40

Now we are to make probability 1/2 add 10 beads to white

15+10+28=50

so probability =25/50=1/2

I think it is helpful for you