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arindameducationusc

  • one year ago

Permutation part 2 (Tutorial) More examples! Awesome!

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  1. arindameducationusc
    • one year ago
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    \(\Huge\color{red}{Permutation~part~2} \) anybody who could not follow part 1 can click the link below. http://openstudy.com/study#/updates/55d9654be4b0a0d51270edbf

  2. arindameducationusc
    • one year ago
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    \(\Large\color{red}{Q} \) How many even numbers are there with 3 digits such that if 5 is the one digit then seven is the next digit. \(\Large\color{blue}{Ans} \) Even numbers are 0,1,2,4,6,8 Case 1) |dw:1440995300524:dw|

  3. arindameducationusc
    • one year ago
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    Case 2=> |dw:1440995388838:dw| This is a case where we calculate the even numbers when 5 is not in hundredth place. We have to consider this also1 so,8*9*5=360 so, total=case1+case2 5+360=365

  4. arindameducationusc
    • one year ago
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    \(\Large\color{red}{Q} \) How many 4 digit number divisible by four can be made with the digits 1,2,3,4,5 if repetition of the digits is not allowed.

  5. arindameducationusc
    • one year ago
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    \(\Large\color{blue}{Ans} \) |dw:1440998584419:dw|

  6. arindameducationusc
    • one year ago
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    in the above 1 and 2 are fixed and in the below 3 and 2 are fixed |dw:1440998804949:dw|

  7. arindameducationusc
    • one year ago
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    below 2 and 4 are fixed |dw:1440998874944:dw|