the average of 5 quantities is 9. the average of 3 of them is 4. what is the average of remaining 2 numbers?  Choices.
A) 16.5 B) 10 C) 8 D) 9.5 E) none of these
<gadget id="calculator">5 * 9</gadget>
<output>45</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">45 - 12</gadget>
<output>33</output>

<gadget id="calculator">33 / 2</gadget>
<output>33/2 = around 16.5</output>

<result>A</result>
the average of 5 quantities is 9. the average of 3 of them is 4. what is the average of remaining 2 numbers?
divide(subtract(multiply(5, 9), multiply(3, 4)), 2)
"answer : a ( 5 x 9 - 3 x 4 ) / 2 = 16.5"