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A bag contains 50 balls consisting of 20 white balls and some red and yellow balls. Three balls are drawn one after another without replacement. The p...

Banking RBI Grade B Prelims Medium Number System (including HCF LCM) MCQ

Question

A bag contains 50 balls consisting of 20 white balls and some red and yellow balls. Three balls are drawn one after another without replacement. The probability that the first ball is white, the second ball is red, and the third ball is yellow is given as 4105\frac{4}{105}. Find the number of yellow balls in the bag.

Options

A.

16

B.

12

C.

10

D.

14

E.

Either 16 or 14

probabilityballswithout replacementrbi grade b

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