请教GMAT题.What was the percent increase in theaverage (arithmetic mean) contribution per member of a certain public radiostation from 1985 to 1995 (1) Total contributions bymembers increased from $505,210 in 1985 to $1,225,890 in 1995.(2) Thenumb

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请教GMAT题.Whatwasthepercentincreaseintheaverage(arithmeticmean)contributionpermemberofacertainpublicra

请教GMAT题.What was the percent increase in theaverage (arithmetic mean) contribution per member of a certain public radiostation from 1985 to 1995 (1) Total contributions bymembers increased from $505,210 in 1985 to $1,225,890 in 1995.(2) Thenumb
请教GMAT题.
What was the percent increase in the
average (arithmetic mean) contribution per member of a certain public radio
station from 1985 to 1995
(1) Total contributions by
members increased from $505,210 in 1985 to $1,225,890 in 1995.
(2) The
number of members exactly doubled from 1985 to 1995.
A.Statement (1) ALONE is
sufficient,but statement (2) alone is not sufficient.
B.Statement (2) ALONE is
sufficient,but statement (1) alone is not sufficient.
Of the people who attended a workshop,60 percent were teachers and some of the teachers were teachers of language arts.What percent of the people who attended the workshop were teachers of language arts?
(1) 200 people attended the workshop.
(2) 72 of the teachers who attended the workshop were not teachers of language arts.
A.Statement (1) ALONE is sufficient,but statement (2) alone is not sufficient.
B.Statement (2) ALONE is sufficient,but statement (1) alone is not sufficient.
C.BOTH statements TOGETHER are sufficient,but NEITHER statement ALONE is sufficient.
D.EACH statement ALONE is sufficient.
E.Statements (1) and (2) TOGETHER are NOT sufficient.
C.BOTH statements TOGETHER
are sufficient,but NEITHER statement ALONE is sufficient.
D.EACH statement ALONE is
sufficient.
E.Statements (1) and (2) TOGETHER
are NOT sufficient.
The positive numbers w,x,y,and z are such that x is 20 percent greater than y,y is 20 percent greater than z,and w is 20 percent less than x.What percent greater than z is w
A.15.2%
B.16.0%
C.20.0%
D.23.2%
E.24.8%

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