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Two balls are drawn at a random with ...

Two balls are drawn at a random with replacement from a box containing 10 black and 8 red balls. Find the probability that i. both the balls are red. Ii. first ball is black and second is are. iii. One of them is black and other is red.

Text Solution

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Given that , Total balls `= 18`
(i) `P(red) = 8/18*8/18=16/81`
(ii) probability`=10/18*8/18= 20/81`
(iii) probability= `(10/18*8/18) + (8/18*10/18)`
`=40/81`
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