The average of 9 numbers is 7 and the average of 7 other numbers is 10. What is the average of all 16 numbers?  Answers:
A) 9 B) 8 5/16 C) 7 7⁄8 D) 7 1⁄2 E) 7 1⁄4
The average of 9 numbers is 7....   The sum of those numbers is (9)(7) = 63.   The average of 7 other numbers is 10....   The sum of those numbers is (7)(10) = 70   The sum of ALL 16 numbers is 63+70= 
<gadget id="calculator">63+70</gadget>
<output>133</output>
133. The average of those numbers is 133/16= 8 5/16.   Final Answer:   [Reveal]Spoiler:   8 5/16
<result>B</result>
The average of 9 numbers is 7 and the average of 7 other numbers is 10. What is the average of all 16 numbers?