A pen stand contains 3 red pens and 4 blue pens. One pen is drawn at random. What will be the
probability of getting a blue pen ?
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Answer :
No. of Red pens in pen stand = 3
No. of blue pens in pen stand = 4
Total no. of pens = 3 + 4
= 7
P ( Blue pen) = No. of favourable outcomes
Total no. of outcomes
p( Blue pen) = 4
7
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