Latest TCS Aptitude Question SOLUTION: 20 passenger are to travelled by double decked bus which can accomodate 13 in upper deck and 7 in lower deck.the no ways that they can be distributed if 5 sit to refuse in upper de

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(#M40024921) TCS Logical Reasoning question Keep an EYE

20 passenger are to travelled by double decked bus which can accomodate 13 in upper deck and 7 in lower deck.the no ways that they can be distributed if 5 sit to refuse in upper deck and 8 refuse to sit n lower deck....

Asked In TCS Mohammad Asfar (11 years ago)

Unsolved Read Solution (7)

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Read Solution (7) :

Akshatha  (11 years ago)

ans is 13C8x7C5x7!.

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Rajat Arora  (11 years ago)

7c5*2c2
upper deck
********----- =>7c5(since 8 who refused to sit on lower deck will desinately sit on upper deck & out of left out 12 5 will never sit on upper deck)
lower deck
*****--2c2 =>(since 5 will definately sit in lower deck who refused to sit on upper deck so left out 2 can fill 2 seats in 1 way only )

Is this solution Helpfull? Yes (3) | No (1)  

sujitha maddula  (11 years ago)

8 mem refuse to sit in lower deck they will sit upper deck in 8! ways,
the 5 mem who refuse to sit in upper deck will sit lower deck in 5! ways,
till now 13 sit are filled remaining 7 mem are filled in 7c5 ways in upper deck and 2 ways in lower deck so,8!*7c5+2!*5! if wrong correct me.......

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manoj chauhan  (11 years ago)

7c2 or 7c5 i. e . 21

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Rajat Arora  (11 years ago)

@sujitha maddula we have to distribute men not arrange them..

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AKULA RAVI SANKAR  (10 years ago)

i think 7c2 or 7C5(both are same no?)

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Chandan Hasija  (8 years ago)

As we know they should be distributed (not arranged) so, 5 in lower and 8 in upper are fixed. remaining 7 can be distributed as 7C5*7C2=441. If i am right!

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