How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(repetition of digits is not allowed)?	Choose the most appropriate option
A) 360  B) 729  C) 365  D) 735  E) 345
The given digits are six.   The number of four digit numbers that can be formed using six digits is ⁶P₄   = 6 * 5 * 4 * 3= 
<gadget id="calculator">6 * 5 * 4 * 3</gadget>
<output>360</output>
360.   360nswer:360
<result>A</result>
How many four digit numbers can be formed using the digits {1, 3, 4, 5, 7,9}(repetition of digits is not allowed)?