In a particular state, 60% of the counties received some rain on Monday, and 55% of the counties received some rain on Tuesday. No rain fell either day in 25% of the counties in the state. What percent of the counties received some rain on Monday and Tuesday? Choose one
A) 12.5%  B) 40%  C) 50%  D) 60%  E) 67.5%
60 + 55 + 25= 
<gadget id="calculator">60 + 55 + 25</gadget>
<output>140</output>
140%   The number is 40% above 100% because 40% of the counties were counted twice.   The answer is 40%.
<result>B</result>
In a particular state, 60% of the counties received some rain on Monday, and 55% of the counties received some rain on Tuesday. No rain fell either day in 25% of the counties in the state. What percent of the counties received some rain on Monday and Tuesday?