Question

A box contains 3 red, 4 black, 5 white balls. A ball is drawn at the random. Find
the probability of
getting a ball which is not red.​

Answer 1

Answer:

total number of balls =3+4+5 = 12.

number of non red balls are 4+5 =9

probability of (non red balls) =9/12  

                                                =3/4

Answer 2

Answer:

3/4

Step-by-step explanation:

Total no. of balls in the bag is 12 (3 red, 5 white and 4 black)

No. of balls that are not red in bag is 9 (5 white, 4 black)

Let A be the event of drawing a ball that is not red from bag

No. of outcomes favorable to A = 9

We know that, Probability P(E) = (Total no.of possible outcomes)

                                                       (No.of favorable outcomes)​

= 9/12 = 3/4

I hope this will help you.