How many three digits odd numbers can be formed by using the digits 4,5,6,7,8,9 if the repetition of the digits not allowed?  Choose the correct choice from the following answers:	A) 60	B) 50	C) 40	D) 70	E) 30
For a number to be odd the unit place must be filled by the number 5,7 or 9 in 3 ways. Since the repetition of digits not allowed the ten's and hundred's place can be filled in by 5 and 4 ways respectively. So the required number of numbers =3*5*4= 
<gadget id="calculator">3*5*4</gadget>
<output>60</output>
60. 60nswer : 60
<result>A</result>
How many three digits odd numbers can be formed by using the digits 4,5,6,7,8,9 if the repetition of the digits not allowed?