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Start the planA poll reveals that the average (arithmetic mean) income of 10 households is $25,000. If 6 of the households have incomes of $30,000 each, what is the average income of the other 4 households?
A. $21,500
B. $20,500
C. $17,500
D. $7,500
E. $7,000
The OA is C













