Question 894605
<p style="font-family:'Courier New'">Please only send 1 question at a time.


a)How many different digit numbers can be formed using the integers 1,2,3,4?

problem is incomplete. i don't know if it's a 2-digit, 3-digit or 4-digit number, the problem is asking about.


b)There are 8 letter boxes in a post office, In how many ways can a man post 4 distinct letters?

{{{8*7*6*5=1680}}}


c)How many numbers of six digits can be formed from the digits 0,1,3,5,7,& 9 when no  digit is repeated?

{{{5*5*4*3*2*1=600}}}


d)In how many ways can four boys & three girls be seated in a row containing seven seats if all three girls are together?

{{{3!4!=144}}}</p>