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anonymous

  • one year ago

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  1. Adi3
    • one year ago
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    wht do u think

  2. imqwerty
    • one year ago
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    nPr=n!/(n-r)! . 1) 6!/(6-3)!=6*5*4=120 . 2) 2/6 * 120 = 40 . 3) 2/6 * 120 = 40 . 4) 1/6 * 120 = 20

  3. anonymous
    • one year ago
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    I do not understand the 2.)

  4. ganeshie8
    • one year ago
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    looks there are 5 questions including the top most question ?

  5. anonymous
    • one year ago
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    yes yes pls explain each question to me

  6. imqwerty
    • one year ago
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    did u understand the third one??

  7. ganeshie8
    • one year ago
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    |dw:1436260927038:dw|

  8. anonymous
    • one year ago
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    yes @imqwerty there are 2 even #s

  9. anonymous
    • one year ago
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    @ganeshie8 yes =)

  10. ganeshie8
    • one year ago
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    im just making sure we all are referring to the same question number :)

  11. imqwerty
    • one year ago
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    no i missed that 0 question

  12. anonymous
    • one year ago
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    =)

  13. anonymous
    • one year ago
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    i do not understand this less than 400

  14. princeharryyy
    • one year ago
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    >>less than 400 :) numbers starting with 2 => keeping two fixed we got two places to fill. => 1way(fixed for 2) * 5ways(to fill the tens place) *4ways(to fill the units place) =>1*5*4 =20 => similarly for numbers starting from 3 => total ways 1*5*4 = 20 total 20+20 = 40 numbers @silverxx

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spraguer (Moderator)
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