Latest Bank Exam Aptitude Question SOLUTION: find the chance of drawing 2 balls in succession from a bag contains 5 red and 7 blue balls,if the balls are not being replaced.

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(#M40152632) BANK EXAM Category question probability Keep an EYE

find the chance of drawing 2 balls in succession from a bag contains 5 red and 7 blue balls,if the balls are not being replaced.

Asked In Bank Exam nitin (9 years ago)

Unsolved Read Solution (3)

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Shalini Mitra  (7 years ago)

Answer is 7/22,
7/12 *6/11

Is this solution Helpfull? Yes (1) | No   

SUMIT SATYARANJAN  (9 years ago)

All the cases without replacement of drawing will be
(First 1 red & then 1 blue) or (First 1 red & then 1 red) or (First 1 blue & then 1 red) or (First 1 blue & then 1 blue) which can be written as
(5/12)*(7/11) + (5/12)*(4/11) + (7/12)*(5/11) +(7/12)*(6/11) = 1

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rajjkumar  (7 years ago)

5times-1red ball and 1blue ball each and next time 2 blue balls
ans:6

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