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mathmath333
 one year ago
In the Suniti Building in Mumbai there are 12 floors plus
the ground floor.9 people get into the lift of the building
on the ground floor.The lift does not stop on the first floor.
If 2,3 and 4 people alight from the lift on its upward
journey,then in how many ways can they do so?(Assume
they alight on different floors)
mathmath333
 one year ago
In the Suniti Building in Mumbai there are 12 floors plus the ground floor.9 people get into the lift of the building on the ground floor.The lift does not stop on the first floor. If 2,3 and 4 people alight from the lift on its upward journey,then in how many ways can they do so?(Assume they alight on different floors)

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mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0\(\large \color{black}{\begin{align} & \normalsize \text{ In the Suniti Building in Mumbai there are 12 floors plus }\hspace{.33em}\\~\\ & \normalsize \text{ the ground floor.9 people get into the lift of the building }\hspace{.33em}\\~\\ & \normalsize \text{ on the ground floor.The lift does not stop on the first floor.}\hspace{.33em}\\~\\ & \normalsize \text{ If 2,3 and 4 people alight from the lift on its upward }\hspace{.33em}\\~\\ & \normalsize \text{ journey,then in how many ways can they do so?(Assume}\hspace{.33em}\\~\\ & \normalsize \text{ they alight on different floors)}\hspace{.33em}\\~\\ & a.)\ 11C3 \times 3P3 \hspace{.33em}\\~\\ & b.)\ 11P3 \times 9C4 \times 5C3 \hspace{.33em}\\~\\ & c.)\ 10P3 \times 9C4 \times 5C3 \hspace{.33em}\\~\\ & d.)\ 12C3 \hspace{.33em}\\~\\ \end{align}}\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0We can select the three floors in 11P3 . Then of the 9 people four can leave in 9C4 ways Three of the remaining 5 can be selected in 5C3 ways so 11p3*9c4*5c3

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0I am having difficulty in interpreting the question

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0well you see in 11P3 order is important

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in 9P3 order doesnt matter any way would be fine

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0does that make sense ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0see there is total of 13 floors 12+ ground floor

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0i know order is important in permutation and order isn't important in combination

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.011p3 where this come from ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0because you see they are already on the ground level and they skip the first floor

anonymous
 one year ago
Best ResponseYou've already chosen the best response.03 is no of ppl leaving the lift

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0srry its not 3 ppl its 3 floors

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i was thinking about 5C3

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0ok and how come 9C4

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now selecting 4 ppl from 9 in 9C4

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0why r u selecting only 4 people

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0( if 2, 3 and 4 people alight from the lift)*

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0now only 8 remaining so now selecting 3 from remaining 5 in 5C3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok in 11C3 , 11 floors and the reason i choose 3 floors because (2,3 and 4 ppl alight from the lift)

dan815
 one year ago
Best ResponseYou've already chosen the best response.0lets just go place my place, there are 4 spots and 9 people

dan815
 one year ago
Best ResponseYou've already chosen the best response.09*8*7*6/4! = 9 choose 4

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0"lets just go place my place, there are 4 spots and 9 people" but where is given in que that their are 4 spots

dan815
 one year ago
Best ResponseYou've already chosen the best response.0you want to know the different groups of 2,3,4 that are possible

mathmath333
 one year ago
Best ResponseYou've already chosen the best response.0but 2,3,4 = 3 groups

dan815
 one year ago
Best ResponseYou've already chosen the best response.0yes but the 4 people that leave

dan815
 one year ago
Best ResponseYou've already chosen the best response.0people are not identical

dan815
 one year ago
Best ResponseYou've already chosen the best response.0from your 9 people there are 9 choose 4 ways of picking a group of 4 people that leave the elevator
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