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Asked On2019-04-10 10:08:10 by:Rohit498

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For the simplicity, Let Bag A and B have 100 balls.
So In Bag A we have: 20 Red balls and 80 Green balls ; In Bag B we have : 30 Red balls , 60 Green balls and 10 yellow balls.
When these balls are mixed. We have Total 100 balls in which 50 are Red balls, 140 are green balls and 10 are yellow balls.
So to pick a ball randomly we have 200 choices.(i.e. 200C1) and to pick a red ball we have 50 choices.(i.e. 50C1)
So the Probability of red ball being picked is 50/200 = 0.25 (i.e. 25%)
Ans. is B) 25%

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