Question

a box contains 4 red balls 5 green balls and some white balls if the probability of red ball is 1 by 3 then number of white balls are​

Answer 1

Answer:

There are 3 white balls

Step-by-step explanation:

Given:

Number of red balls=4

Number of Green balls=5

Probability of red ball=1/3

To find :

Number of white balls.

Solution:

Let the total number of balls be X and total number of white balls be W.

Probability of the red balls =

(Number of red balls) ÷

(total number of balls)

1/3=4/X

X=4×3=12

The total number of balls are 12.

As we know that there are white Red and Green balls,

The total number of balls =

red balls+green balls+white balls

12=4+5+W

12=9+W

-W=9-12

-W=(-3)

W=3

Ans : Thus, there are 3 white balls.