the average age of 20 men in the class is 15.6 years. 5 new men join and the new average becomes 14.56 years. what was the average age of 5 new men? Choose one:
A) 15.5
B) 15.4
C) 15.25
D) 10.4
E) 15.6
<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 14.56</gadget>
<output>364</output>

<gadget id="calculator">20 * 15.6</gadget>
<output>312</output>

<gadget id="calculator">364 - 312</gadget>
<output>52</output>

<gadget id="calculator">52 / 5</gadget>
<output>52/5 = around 10.4</output>

<result>D</result>
the average age of 20 men in the class is 15.6 years. 5 new men join and the new average becomes 14.56 years. what was the average age of 5 new men?
divide(subtract(multiply(add(20, 5), 14.56), multiply(20, 15.6)), 5)
total age of 20 men = 15.6 x 20 = 312 now , total age of 25 men = 364 . total age of five men added later = 364 - 312 = 52 . hence , the total average of five men = 52 / 5 = 10.4 answer : d