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![[Post New]](/templates/default/images/icon_minipost_new.gif) 23 Apr 2008 12:13:24 IST
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1050 = 2 * 3 * 5 * 5 * 7
Now we have been given x1 , x2 , x3 , x4 , x5
now 2 or 3 or 7 , so number of ways = 5 3 ways
So we have 5 to deal with
Now we can have 2 * 3 * 7 * 25 * 1 or 2 * 3 * 7 * 5 * 5
So number of ways of arranging the 5 s are 5 C1 + 5 C2 = 15
So total number of ways = 5 3 * 15 = 125 * 15 = 1875
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