the sales force a bussiness consists 10 men and 10 women. a production unit of 7 people are choosen at ramdon. what is the prob it will include 2 men and 5 women?

Question

anonymous · Answer

didnt I already answer this?
do you know permutations and combinations?

anonymous · Answer

I meant do you understand permutations and combinations?

anonymous · Answer

Go back to previous time you asked this, I gave more explanation on dhatraditya's work

anonymous · Answer

now wat

anonymous · Answer

This is probably the 10th question on this subject you've asked about, and it doesn't seem like you're any closer to learning what you need to know to solve these on your own.. Maybe you should actually spend some time reading the book?
$$\frac{{10 \choose 2} * {10 \choose 5}}{20 \choose 7}$$

anonymous · Answer

i got that up to the ending but then i come w the decinmal

anonymous · Answer

yes, probabilities are between 0 and 1 and  typically decimals

anonymous · Answer

(10C2*10C5)/(20C7) = 45*252/77520= 1134/7752 = 567/3876 = 189/1

anonymous · Answer

189/1? how did you get that?

anonymous · Answer

and then do u devide all them ?

anonymous · Answer

i have no idea what you are talking about.

anonymous · Answer

how do u get the answer?

anonymous · Answer

What you have above is correct except the last fraction.

anonymous · Answer

ok now what?

anonymous · Answer

the end? If you want a decimal approximation you could plug that fraction into your calculator

anonymous · Answer

all them?

anonymous · Answer

they're all the same fraction (except the 189/1 which I have no idea where it came from)

anonymous · Answer

so i would devide all those numbers? or?

anonymous · Answer

1134/7752. use your calculator to do that division. the answer will be a decimal number.
that is your answer.

anonymous · Answer

6.835978835

anonymous · Answer

so would the answer be 6.84?

anonymous · Answer

oh come on! 

what is 1134 divided by 7752?

anonymous · Answer

0.1462848