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प्रश्न
A bag contains 5 black, 7 red and 3 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is black or white.
बेरीज
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उत्तर
Total no. of possible outcomes = 15 {5 black, 7 red and 3 white balls}
E ⟶ event of drawing black or white
No. of favourable outcomes = 8 {5 black and 3 white}
Probability, P(E) =`"No. of favorable outcomes"/"Total no. of possible outcomes"`
P(E) = `8/15`
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