In a certain alphabet, 16 letters contain a dot and a straight line. 30 letters contain a straight line but do not contain a dot. If that alphabet has 50 letters, all of which contain either a dot or a straight line or both, how many letters contain a dot but do not contain a straight line?	Select
A) 4	B) 8	C) 12	D) 16	E) 20
We are told that all of the letters contain either a dot or a straight line or both, which implies that there are no letters without a dot and a line (no line/no dot box = 0).   First we find the total # of letters with lines:  16 +30= 
<gadget id="calculator"> 16 +30</gadget>
<output>46</output>
46;   Next, we find the total # of letters without line:  50 - 46= 
<gadget id="calculator"> 50 - 46</gadget>
<output>4</output>
4;   Finally, we find the # of letters that contain a dot but do not contain a straight line: 4 - 0= 
<gadget id="calculator">4 - 0</gadget>
<output>4</output>
4.   4nswer: 4
<result>A</result>
In a certain alphabet, 16 letters contain a dot and a straight line. 30 letters contain a straight line but do not contain a dot. If that alphabet has 50 letters, all of which contain either a dot or a straight line or both, how many letters contain a dot but do not contain a straight line?