Question

there are 12 balls of three colours of bag out of them 3 are red 4 white 3 or green find the probability of getting a green or white ball​

Answer 1

Step-by-step explanation:

so there are 12 balls

3 are red

4 white

3 green

2 are some other color

they asked for green or white...so from this you find out that the red balls and the other colored balls aren't required...so subtract the number of red balls and other colored balls from the total

by that.. you are left with 7 balls(3 green and 4 white)

so then it's simple....7/12 is the probability

Answer 2

Step-by-step explanation:

Total No. of balls = 12

No. of red balls = 3

No. of white balls = 4

No. of green balls = 3

Therefore, the probability of taking a ball that is either white or green is:

 4+3/12

=7/12