## anonymous 5 years ago 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?

1. anonymous

2. anonymous

I meant do you understand permutations and combinations?

3. anonymous

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

4. anonymous

now wat

5. anonymous

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? $\frac{{10 \choose 2} * {10 \choose 5}}{20 \choose 7}$

6. anonymous

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

7. anonymous

yes, probabilities are between 0 and 1 and typically decimals

8. anonymous

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

9. anonymous

189/1? how did you get that?

10. anonymous

and then do u devide all them ?

11. anonymous

i have no idea what you are talking about.

12. anonymous

how do u get the answer?

13. anonymous

What you have above is correct except the last fraction.

14. anonymous

ok now what?

15. anonymous

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

16. anonymous

all them?

17. anonymous

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

18. anonymous

so i would devide all those numbers? or?

19. anonymous

20. anonymous

6.835978835

21. anonymous

so would the answer be 6.84?

22. anonymous

oh come on! what is 1134 divided by 7752?

23. anonymous

0.1462848