In a certain alphabet, 10 letters contain a dot and a straight line. 24 letters contain a straight line but do not contain a dot. If that alphabet has 40 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? Choose the correct option
A) 6 B) 8 C) 14 D) 20 E) 28
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:  10+24= 
<gadget id="calculator"> 10+24</gadget>
<output>34</output>
34;   Next, we find the total # of letters without line:  40 - 34= 
<gadget id="calculator"> 40 - 34</gadget>
<output>6</output>
6;   Finally, we find the # of letters that contain a dot but do not contain a straight line: 6 - 0= 
<gadget id="calculator">6 - 0</gadget>
<output>6</output>
6.   6
<result>A</result>
In a certain alphabet, 10 letters contain a dot and a straight line. 24 letters contain a straight line but do not contain a dot. If that alphabet has 40 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?