单项选择题
|
ENROLLMENT FACULTY SIZE，FACULTY SALARY， AND TUITION AT COLLEGE R FOR SELECTED YEARS |
|||
| Number of Students Enrolled | 1，490 | 1，600 | 1，790 |
| Number of Faculty members | 166 | 160 | |
| Ratio of students to Faculty | — |
 |
 |
| Average* Faculty Salary | — | $14，360 | $28，400 |
| Tuition per Student | $1，400 | $2，000 | $3，700 |
| Total Faculty Salaries | $1，245，000 | — | $4.629，200 |
| Income from Tuition | $2，086，000 | $3，200，000 | — |
*Arithmetic mean
The increase in tuition per student from1970 to 1980 was approximately how many times as great as the increase from 1960to 1970（）
A.A
B.B
C.C
D.D
E.E
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