There are 4 people of different heights standing in order of increasing height. The difference is 2 inches between the first person and the second person, and also between the second person and the third person. The difference between the third person and the fourth person is 6 inches and the average height is 76. How tall is the fourth person?  Choose the correct choice from the following answers: A) 76 B) 78 C) 80 D) 82 E) 84
Let x be the height of the first person.   Then the heights are x, x+2, x+4, and x+10.   4x+16 = 4(76) = 304   x = 72 and the fourth person has a height of 72+10= 
<gadget id="calculator">72+10</gadget>
<output>82</output>
82 inches   The answer is 82.
<result>D</result>
There are 4 people of different heights standing in order of increasing height. The difference is 2 inches between the first person and the second person, and also between the second person and the third person. The difference between the third person and the fourth person is 6 inches and the average height is 76. How tall is the fourth person?