A bag contains $12$ white balls, $12$ green balls and $12$ purple balls. After $3$ white balls, $4$ green balls and $9$ purple balls have been removed. What is the probability that the next ball to be selected will be white?

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Solution

$\begin{matrix} A f t e r r e m o v i n g 3 w h i t e b a l l s, 4 g r e e n b a l l s a n d 9 p u p l e b a l l s n u m b e r o f b a l l s l e f t = 8 + 8 + 3 = 9 t o t a l n o . o f b a l l s l e f t = 8 + 8 + 3 = 0 p r o b a b i l i t y o f s e l e c t i n g w h i t e b a l l s = \frac{9}{20} \end{matrix}$

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A bag contains 12 white balls, 12 green balls and 12 purple balls. After 3 white balls, 4 green balls and 9 purple balls have been removed. What is the probability that the next ball to be selected will be white?

Afterremoving3whiteballs,4greenballsand9pupleballsnumberofballsleft=8+8+3=9totalno.ofballsleft=8+8+3=0probabilityofselectingwhiteballs=920

A bag contains $12$ white balls, $12$ green balls and $12$ purple balls. After $3$ white balls, $4$ green balls and $9$ purple balls have been removed. What is the probability that the next ball to be selected will be white?