The average of 11 numbers is 10.9. If the average of first six is 10.5 and that of the last six is 11.9 the sixth number is?
Choose the correct choice from the following options.
A) 11.4 B) 14.5 C) 11.8 D) 11.5 E) 11.1
1 to 11 = 11 * 10.9= 
<gadget id="calculator">11 * 10.9</gadget>
<output>119.9</output>
119.9   1 to 6= 6 * 10.5= 
<gadget id="calculator">6 * 10.5</gadget>
<output>63</output>
63   6 to 11= 6 * 11.9= 
<gadget id="calculator">6 * 11.9</gadget>
<output>71.4</output>
71.4   63 + 71.4= 
<gadget id="calculator">63 + 71.4</gadget>
<output>134.4</output>
134.4 – 119.9= 14.5   6th number = 11.5   Answer: 14.5
<result>B</result>
The average of 11 numbers is 10.9. If the average of first six is 10.5 and that of the last six is 11.9 the sixth number is?