Question

A bag contains 15 red baloons and 25 green balloons what is the probability of getting a red balloon if we put 2 red balloons and 5 green balloons what is the probability of getting a green balloon

Answer 1

Probability of getting a red balloon is 0.375.

Probability of getting a green balloon is 0.638.

Step-by-step explanation:

We are given that a bag contains 15 red balloons and 25 green balloons and we have to find the probability of getting a red balloon.

Probability of any event = $\frac{\text{Favorable number of outcomes}}{\text{Total number of outcomes}}$

Also, Probability is never negative and does not exceed 1 which means the value of probability of any event lies between 0 and 1.

Now, probability of getting a red balloon =  $\frac{\text{Number of red balloons in bag}}{\text{Total number of balloons in bag}}$

Here, number of red balloons in a bag = 15

Total number of balloons in bag = 15 + 25 = 40

So, Probability of getting a red balloon =  $\frac{15}{40}$ = 0.375

Now, we are given that we put 2 red balloons and 5 green balloons in the bag.

So, number of red balls in bag = 15 + 2 = 17

     number of green balls in bag = 25 + 5 = 30

     Total number of balls in bag = 17 + 30 = 47

Now, probability of getting a green balloon =  $\frac{\text{Number of green balloons in bag}}{\text{Total number of balloons in bag}}$

      Probability of getting a green balloon =  $\frac{30}{47}$ = 0.638

Therefore, probability of getting a red balloon is 0.375  and probability of getting a green balloon is 0.638.