Number system

Submitted by humraj on Fri, 2007-10-19 19:43

How many 6-digit numbers contain exactly 4 different digits?

Posted on: Fri, 2007-10-19 21:01 #1

Joined: 2007-03-03

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4! x 10C4 x 102

9 x ⁹C₃x 6²x 4!

Posted on: Sat, 2007-10-20 00:49 #2

Joined: 2007-06-14

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wats the ans.....?? m gettin

wats the ans.....?? m gettin as 9 x 8 x 7 x 6 x 4 x 4 = 48384

Posted on: Sat, 2007-10-20 04:55 #3

Joined: 2007-08-30

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Hi Neel...Can u explain the

Hi Neel...Can u explain the logic behind 9 x 8 x 7 x 6 x 4 x 4 = 48384???

...RK...

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Posted on: Sat, 2007-10-20 15:29 #4

Joined: 2007-10-12

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HUMRAJ BHAI...is it

(10C5)* (6!/2!)

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I know its coming.....and I know i can handle it the best....

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