Question

A bag contains 7 white, 3 red and 4 black balls. A ball is drawn at random. Find the probability that

it is a red or a black ball.

Answer 1

white ball=7
red ball=3
black ball=4
Total no. of balls=7+3+4=14
probability of getting red ball=3/14
and black ball=4/14

Answer 2

Hey friend...!! here's your answer
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No. of white balls = 7
no. of red balls = 3
no. of black balls = 4

P(E) = No. of Favourable outcomes / Total outcomes

Total outcomes = 7 + 3 + 4. = 14

P(Red balls) = 3/ 14

P(Black balls) = 4/ 14
= 2/7


So that the Probability of red balls is 3/14 and Probability of black balls is 2/7

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#Hope its help