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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?

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  1. anonymous
    • 5 years ago
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    there are 10C2 ways of choosing 2 men. there are 10C5 ways of choosing 5 women there are 20C7 ways of choosing 7 people from 20 people. multiply the first two and divide by the second.

  2. anonymous
    • 5 years ago
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    what r u multoplying thou?

  3. anonymous
    • 5 years ago
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    10c2 times 10c5 divided by 20c7

  4. anonymous
    • 5 years ago
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    how do u do that on the calculator a reg one

  5. anonymous
    • 5 years ago
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    105c5?

  6. anonymous
    • 5 years ago
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    ok, 10C2 = 10*9/2! 10C5 = 10*9*8*7*6/5! 20C7 = 20*19*18*17*16*15*14/7! remember that 7! = 7*6*5*4*3*2*1, then do what dhatraditya said

  7. anonymous
    • 5 years ago
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    so u mutlply all those?

  8. anonymous
    • 5 years ago
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    10c2= 45

  9. anonymous
    • 5 years ago
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    10c5= 6048

  10. anonymous
    • 5 years ago
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    10C5 = 252

  11. anonymous
    • 5 years ago
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    http://www.youtube.com/watch?v=XqQTXW7XfYA&feature=related http://www.mathsisfun.com/combinatorics/combinations-permutations.html http://www.mathsisfun.com/combinatorics/combinations-permutations-calculator.html see all the related videos from khanacademy too for permutations and combinations.

  12. anonymous
    • 5 years ago
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    55814400 20c7

  13. anonymous
    • 5 years ago
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    so now what?

  14. anonymous
    • 5 years ago
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    6048*252/55814400 is your answer

  15. anonymous
    • 5 years ago
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    1524096

  16. anonymous
    • 5 years ago
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    45*252/77520= 1134/7752 = 567/3876 = 189/1292

  17. anonymous
    • 5 years ago
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    =(10C2*10C5)/(20C7)

  18. anonymous
    • 5 years ago
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    ah, I trusted prettychickas answer than 20c7 is 55814400

  19. anonymous
    • 5 years ago
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    wait what

  20. anonymous
    • 5 years ago
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    what r u multuplying everything

  21. anonymous
    • 5 years ago
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    is it a decimal?

  22. anonymous
    • 5 years ago
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    there are 10C2 ways of choosing 2 men. there are 10C5 ways of choosing 5 women there are 20C7 ways of choosing 7 people from 20 people. multiply the first two and divide by the second (10C2*10C5)/(20C7) = 45*252/77520= 1134/7752 = 567/3876 = 189/1292

  23. anonymous
    • 5 years ago
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    so u devide those now?

  24. anonymous
    • 5 years ago
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    It depends, what format is required? fractions are ok, so long as they are reduced.

  25. anonymous
    • 5 years ago
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    ok so

  26. anonymous
    • 5 years ago
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    i dont get it i am getting a decimal

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