A bag initially contains one red & two blue balls. An experiment consisting of selecting…
Mathematics · JEE Advanced · NTA Exams — Statistics and Probability
A bag initially contains one red & two blue balls. An experiment consisting of selecting a ball at random, noting its colour & replacing it together with an additional ball of the same colour. If three such trials are made, then :
- probability that atleast one blue ball is drawn is 0.9
- probability that exactly one blue ball is drawn is 0.2
- probability that all the drawn balls are red given that all the drawn balls are of same colour is 0.2
- probability that atleast one red ball is drawn is 0.6 .
Answer
(A) probability that atleast one blue ball is drawn is 0.9, (B) probability that exactly one blue ball is drawn is 0.2, (C) probability that all the drawn balls are red given that all the drawn balls are of same colour is 0.2, (D) probability that atleast one red ball is drawn is 0.6 .
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