statistics

In the past a certain college has found that 35% of the students will grad within 4 years. A random sample of 450 students at this college is taken and going to be followed until graduation.

A. What is the sampling distribution of the statistic of interest?

B. What is the probality that 135 or less students grad within 4 years for the sample of 450 students??

C. Based on your probability in part b, what do you think about the claim 35% of students will grad in 4 years at this college

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