问题
单项选择题
可用性与成本的关系是（）。
A、成反比
B、没有关系
C、二元关系
D、成正比
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
可用性与成本的关系是（）。
A、成反比
B、没有关系
C、二元关系
D、成正比
参考答案：A
An analyst has recently determined that only 70 percent of all U. S. pension funds have holdings in hedge funds. In evaluating this probability, a random sample of 40 U.S. pension funds is taken. The number of U. S. pension finds in the sample of 40 that have hedge funds in their portfolio would most accurately be described as:
A．
| A. multivariate random variable. |
B．
| B. a continuous random variable. |
C．
| C. a binomial random variable. |