Average of money that group of 4 friends pay for rent each month is $800.After one persons rent is increased by 20% the new mean is $870.What was original rent of friend whose rent is increased?	Choose the correct choice from the following answers.
A) 800  B) 1400  C) 1000  D) 1100  E) 1200
0.2X = 4(870-800)   0.2X = 280   X = 1400   Answer 1400
<result>B</result>
Average of money that group of 4 friends pay for rent each month is $800.After one persons rent is increased by 20% the new mean is $870.What was original rent of friend whose rent is increased?