Find the indicated probability.

Question

~~A student from the community college is selected at random. Find the probability that the student is at least 31. Round approximations to three decimal places.

The age distribution of students at a community college is given below.

Age (years) Number of students (f)

under 21              411

21-25                   410

26-30                   210

31-35                   52

over 35                25

1108

Question Options

A. 0.069

B. 0.047

C.0.931

D 77

 

 

 

Answer 1

First find the total number of students: 411+410+210+52+25=1108, as shown under the list.

How many are at least 31? 52+25=77. So the probability of selecting a student 31 years old or more is 77/1108=0.069, answer A.