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anonymous

  • one year ago

counting question

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    @ASAAD123 can hlp

  3. IrishBoy123
    • one year ago
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    you have 1AB2 and 1CD5

  4. IrishBoy123
    • one year ago
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    A,B,C,D are all somewhere in 0,...9

  5. IrishBoy123
    • one year ago
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    can you take it from there?

  6. IrishBoy123
    • one year ago
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    can't give answers!

  7. anonymous
    • one year ago
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    |dw:1441103308403:dw|

  8. anonymous
    • one year ago
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    can i solve it by scientific calc

  9. IrishBoy123
    • one year ago
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    how many ways to choose A, then for each A you choose, how many ways to pick B repeat for C,D

  10. anonymous
    • one year ago
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    by npr or ncr

  11. IrishBoy123
    • one year ago
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    you can do it in your head if you know how to do it

  12. IrishBoy123
    • one year ago
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    nCr

  13. anonymous
    • one year ago
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    NO @Nourage

  14. IrishBoy123
    • one year ago
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    but really, it's easier than that

  15. anonymous
    • one year ago
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    how i do it by ncr

  16. IrishBoy123
    • one year ago
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    you have 10 ways to choose A, right?

  17. anonymous
    • one year ago
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    |dw:1441103482580:dw|

  18. IrishBoy123
    • one year ago
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    \[C_{1}^{10}\]!!

  19. IrishBoy123
    • one year ago
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    ie you don't need it

  20. IrishBoy123
    • one year ago
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    then once you have chosen A, you have 10 ways to choose B

  21. IrishBoy123
    • one year ago
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    @ASAAD123 's drawing is a really nice clue

  22. anonymous
    • one year ago
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    i want to do it by calc how

  23. anonymous
    • one year ago
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    can u tell me

  24. anonymous
    • one year ago
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    you don't need a calc, you need think about the problem.

  25. anonymous
    • one year ago
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    i can solve it by think but i want to know how to do it by calc

  26. anonymous
    • one year ago
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    bec think take alot of time

  27. anonymous
    • one year ago
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    can u hlp

  28. anonymous
    • one year ago
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    by calc ncr or npr and how

  29. anonymous
    • one year ago
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    for the first digit, you have 1 way (1), for second and third digit you have 10 ways(0-9), and for last digit you have 2 ways (2 or 5). then use product rule. that's it

  30. anonymous
    • one year ago
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    i need to know how to do it by ncr or npr can u hlp

  31. anonymous
    • one year ago
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    and why (0-9)

  32. anonymous
    • one year ago
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    can u tell me how to do it by ncr or npr@IrishBoy123

  33. anonymous
    • one year ago
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    @IrishBoy123

  34. anonymous
    • one year ago
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    @ganeshie8 can u hlp

  35. anonymous
    • one year ago
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    \[1C1 \times 10C1 \times10C1\times 2C1\]

  36. anonymous
    • one year ago
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    ok thank u @ASAAD123

  37. anonymous
    • one year ago
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    ok but why u do(0-9) why not(0-8) or any thing like this

  38. anonymous
    • one year ago
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    0 is neither negative nor positive. sometimes is is counted as positive

  39. anonymous
    • one year ago
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    ok but why u use 9 not other digit

  40. anonymous
    • one year ago
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    there are only 10 digits (0,1,2,3,4,5,6,7,8,9)

  41. anonymous
    • one year ago
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    ok why u chose 9 not 1 or 2 or 3or other digit

  42. anonymous
    • one year ago
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    every number in the world is contained one or more of these digits.

  43. anonymous
    • one year ago
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    for example: 1092 1912 1475

  44. anonymous
    • one year ago
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    u chose 9 bec it is the end of the numer right or wrong

  45. anonymous
    • one year ago
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    the end of digits

  46. anonymous
    • one year ago
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    bec the numbers start from 0 to 9

  47. anonymous
    • one year ago
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    ok digits from 0 to 9 rihgt or wrong

  48. anonymous
    • one year ago
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    ok mr asaad can u tell me why u 1*10*10*2 and what is the Relationship between this and (0-9) that u wrote it 2nd

  49. anonymous
    • one year ago
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    @ASAAD123

  50. anonymous
    • one year ago
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    hlp

  51. mathmate
    • one year ago
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    @Nourage These nice people have been trying to help you do the counting, exactly as you posted "counting question". Be patient and listen to the explanations. Calculations come later, when you understand how you count. In counting as in ALL math problems, blindly applying a formula does not work. You need to understand the problem first, then try to understand HOW you want to solve the problem. Formulas are just tools to help you when you need it.

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