Set S contains exactly 10 numbers and has an average (arithmetic mean) of 6.2. If one of the numbers in Set S is increased by 7, while all other numbers remain the same, what is the new average of Set S? Choose one:	A) 6.6	B) 6.7	C) 6.8	D) 6.85	E) 6.9
Old set S - Total is avg * no of elements = 6.2*10= 
<gadget id="calculator">6.2*10</gadget>
<output>62</output>
62   If one number is increased by 7 then total increased to  62+7= 
<gadget id="calculator"> 62+7</gadget>
<output>69</output>
69   New avg - 69/10= 6.9.   Hence answer is 6.9.
<result>E</result>
Set S contains exactly 10 numbers and has an average (arithmetic mean) of 6.2. If one of the numbers in Set S is increased by 7, while all other numbers remain the same, what is the new average of Set S?