The average height of 6 people is 67 inches. When Robert's height is included, the average increases by 2 inches. How tall is Robert in inches?
Choose the correct choice from the following options:
A) 81	B) 72	C) 69	D) 84	E) 67
Total height of 6 people = 6*67= 
<gadget id="calculator">6*67</gadget>
<output>402</output>
402   Total height of 7 people= 7*69= 
<gadget id="calculator">7*69</gadget>
<output>483</output>
483   Robert's height= 483-402= 
<gadget id="calculator">483-402</gadget>
<output>81</output>
81 inches   81nswer is 81
<result>A</result>
The average height of 6 people is 67 inches. When Robert's height is included, the average increases by 2 inches. How tall is Robert in inches?