Real Numbers

Question

An urn contains 9 red, 7 while and 4 black balls. A ball is drawn at random. Find the probability that ball is (i) red or white, (ii) white or black, (iii) not red.

Solution

Solution not provided.
Ans. $left parenthesis straight i right parenthesis space 4 over 5 space space left parenthesis ii right parenthesis space 11 over 20 space left parenthesis iii right parenthesis space 11 over 20$

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Real Numbers

An urn contains 9 red, 7 while and 4 black balls. A ball is drawn at random. Find the probability that ball is (i) red or white, (ii) white or black, (iii) not red.

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