Saturday, 8 February 2014

Question of the Day No. 34

How many 4 Digit Numbers can be made from 0,1,5,4,9. If repetition is not allowed.

a) 104       b) 90     c) 96     d) 92    e) None of these
Answers and Explanations are welcome in comments
The Correct Answer will be Given Tomorrow
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1 comment:

  1. Unknown11 February 2014 at 04:36

    Answer and Explanation of Question No. 34

    Correct Answer is : (c) "96"
    Explanation : We can do it either by Permutation Or Combination.

    5!-4!

    Total Numbers are 5! (120) but starting with 0 are not 5 digit numbers so there are 4! (24) numbers starting with 0

    So Total 5 Digits number are 120-24 = 96

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