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In a box, there are 2 red, 3 black and 4 blue coloured balls. The probability of drawing 2 blue balls in sequence without replacing, and then drawing 1 black ball from this box is _________%. (GATE-Agricultural-Engineering-2018)

In a box, there are 2 red, 3 black and 4 blue coloured balls. The probability of drawing 2
blue balls in sequence without replacing, and then drawing 1 black ball from this box is
_________%. (GATE-Agricultural-Engineering-2018)


Asked On2019-04-10 14:20:43 by:naikaumprakash

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Answers
There are two approachesfor solving the problem  :-
Non combination approach
Combination Approach. 
Answer is given below :-
 The probability of drawing 2 blue balls in sequence without replacing, and then drawing 1 black ball from this box is 2/7.


Answerd on:2019-05-17 Answerd By:RSHAH12

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