When a three - cabin train arrives, commuters waiting on the station platform can enter any of the three cabins. $$\frac{1}{7}$$ of the commuters enters the first cabin and $$\frac{1}{5}$$ of them enteres the second cabin. <hr> If the number of the commuters waiting is between 100 and 110 how many commuters will enter the last cabin? <br> <input min="0" type="number" id ="imp6pg069q15_1" class="lineinput" placeholder="?" />