Question

a bag contains 28 black and white balls the probability of black balls is three times that of the white was it 14 red balls are added in the box then find the new probabilities of the three coloured balls​

Answer 1

Answer:

P(white)=7/42

P(black)=21/42

P(red)=14/42

Step-by-step explanation:

Lets suppose that x is the number of white balls. Then,

White=x

Black=3x

3x+x=28(because white + black= 28)

4x=28

x=28/4

x=7.

White=7

Black=3 x 7

        =21.

Red=14

Red balls + Black balls + White balls

14+21+7=42

New probability:

White=7/42

Black=21/42

Red=14/42

Hope this helps!!