It is...........
2.789=2 ones and 7 tenths 8 hundreths 9 thousandths
        
             
        
        
        
Ok pretty sure the probability of a 5 is 1/5 
The probability of a # greater than 3 is 2/5 
And the probability of a 2 or 5 is 2/5 
(1/5 is 20% and 2/5 is 40% if you need those)
        
             
        
        
        
  4315
<u>+5684
</u>  9999    So 5684 is the greatest number you can write.<u>
</u>