virtus
A family consists of a mother, a father, 4 girls and 3 boys. In how many ways can 9 people be arranged around a table if:
The parents are separated by two seats , and these seats are both occupied by girls
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hba
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sorry couldnt get it
virtus
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as in you don't understand the question?
hba
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i know its permutation and combination but its been a long time ive studied it
Romero
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sorry I'm not that familiar with stats and probability
virtus
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thats ok
Hashir
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its easy
virtus
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show us the magic then smarty pants :D
hba
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:D
Hashir
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|dw:1342261115716:dw|
Hashir
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solve it .. and you get your answer
virtus
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Smarty pants can you explain how you just got those no.s?
Hashir
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yup i can
hba
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see there are 2 parents 4 girls and 3 boys and the rest hashir will tell u
Hashir
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see there are 2 possibilities in mother and father either mother in first one or father in first one .... secondly .... 4 and 3 possibilities in between them ..... finally we can arrange the rest randomly so 5!
virtus
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oh why can't you just do 4! x 5!?
hba
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@Hashir If u would have asked me this 2 years ago i would have answered
Hashir
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because 4! and 5! is right /// but i am telling you how i derive it
Hashir
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@virtus : got it dumb pants ???
Hashir
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^^ lOL JOKING .. NO OFFENSE
virtus
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HAHAHAHAHAHAHA i like your sense of humor. YES dumb pants has got it! thanks for your help :D
Hashir
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my pleasure :D