Question

The score distribution shown in the table is for all students who took a yearly AP statistics exam. An AP statistics teacher had 48 students preparing to take the AP exam. Though they were obviously not a random​ sample, he considered his students to be​ "typical" of all the national students.​ What's the probability that his students will achieve an average score of at least​ 3?

Answer 1

Answer:

Probability that his students will get at least 3 is 0.9875

Step-by-step explanation:

In the given scenario the number of favorable outcomes are 3 out of 5 that  is 3,4,5 out of five.

  Probability = no of favorable outcomes/ sample space  

Probability his students will get 3 or more = 3/5/48= 0.6/48= 0.0125

Probability of at least getting 3 or more = 1- Probability of getting 3 or more

Probability that his students will getting at least 3 = 1- P( 3 or more)

                                                                                  = 1- 0.0125

                                                                                     = 0.9875