A bag contains 5 reds balls , 8 black balls and 7 white balls . One ball is chosen at random .what is the probability that the chosen ball is black

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Solution

Dear student
number of red balls=5
number of black balls=8
number of white balls=7
the total number of balls=5+8+7=20
$p r o b a b i l i t y o f b l a c k b a l l = \frac{t o t a l n u m b e r o f b l a c k b a l l s}{t o t a l n u m b e r o f b a l l s} = \frac{8}{20} = \frac{2}{5}$
regards

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A bag contains 5 red, 8 black and 7 white balls. One ball is chosen at random. What is the probability that the chosen ball is black?

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