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A lady’s bag contains 2 black …

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A lady’s bag contains 2 black and 1 red pens. One pen is drawn at random and then put back in the box after noting its colour. The process is repeated again. If X denotes the number of red pens recorded in the two draws. Describe X.

Posted by Deepansh Jayara 3 years, 1 month ago

CBSE > Class 12 > Applied Maths

1 answers

Gembali Harsha Vardhan 3 years, 1 month ago

Let 2 white ball be denoted by W₁, W₂ & red ball by r We draw two balls, one after the other Sample space = S = {(W₁, W₁), (W₂, W₂), (W₁, W₂), (r, W₂), (W₂, r), (W₂, W₁), (r, w₁), (W₁, r), (r, r)} Let X: Number of red balls in two draws We can see there are 0 red, 1 red and 2 red balls So, X = 0 or X = 1 or X = 2

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CBSE > Class 12 > Applied Maths