<p>There are 4 colors of lottery tickets in a hat. If 1/10 of the tix are green, 1/2 are white, 1/4 are blue and the remaining are pink, what is the number of blue tickets in the hat?</p>
<p>This question is not well-defined. It depends on the total number of tickets:</p>
<p>For example, suppose there are 20 tickets. Then there are 2 green tickets, 10 white tickets, and 5 blue tickets. Since there are 3 tickets left, they must be pink.</p>
<p>Now suppose there are 40 tickets. Then there are 4 green tickets, 20 white tickets, 10 blue tickets. So there are 6 pink tickets.</p>
<p>So there can be 5 blue tickets, and there can also be 10 blue tickets (as well as lots of other possibilities).</p>
<p>Perhaps you forgot to write down a piece of information (did they give the total number of tickets?)</p>
<p>it would be 3/20 x total amount of tickets. If there are 20 tickets, 3 would be pink, if 40, 6 would be pink</p>