Subject
Quantitative Aptitude
Topic
Probability
Find the probability that one ball is white when two balls are drawn at random from a basket that contains 9 red, 7 white and 4 black balls.
Find the probability that one ball is white when two balls are drawn at random from a basket that contains 9 red, 7 white and 4 black balls.
ক)
18/95খ)
18/190গ)
1/2ঘ)
91/190Explanation
Total number of elementary events = ways =190 There are 7 white balls out of which one white can be drawn in 7 C 1 ways and one ball from remaining 13 balls can be drawn in ways So,favourable events = Therfore,required probability = = 91/90Related questions
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