The average temperature for Wednesday, Thursday and Friday was 40oC. The average for Thursday, Friday and Saturday was 41oC. If temperature on Saturday was 42oC, what was the temperature on Wednesday?	Choose one:
A) 39oC B) 44oC C) 38oC D) 41oC E) None
Solution: Average temperature for Wednesday, Thursday and Friday = 40oC   Total temperature = 3*40= 
<gadget id="calculator">3*40</gadget>
<output>120</output>
120oC   Average temperature for Thursday, Friday and Saturday= 41oC   Total temperature = 41*3= 
<gadget id="calculator">41*3</gadget>
<output>123</output>
123oC   Temperature on Saturday= 42oC   Now,   (Thursday + Friday + Saturday) - (Wednesday + Thursday + Friday) = 123-120;   Saturday - Wednesday = 3   Wednesday = 42-3= 
<gadget id="calculator">42-3</gadget>
<output>39</output>
39oC.   39oCnswer: Option 39oC
<result>A</result>
The average temperature for Wednesday, Thursday and Friday was 40oC. The average for Thursday, Friday and Saturday was 41oC. If temperature on Saturday was 42oC, what was the temperature on Wednesday?