Posted by **Rhea** on Saturday, October 23, 2010 at 8:30pm.

A test has 15 true or false questions and 10 multiple choice questions (each with 4 choices). All questions are weighted equally. Jack has not studied at all for the test and randomly guesses.

1. What is the probability that Jack gets 96% on the test?

a. 0.000000001

b. 0.000000002

c. 0.0000007

d. 0.000000004

A

2. Assuming that jack takes the same test 20 different times and the tests determine his final mark (weighted evenly); what is the probability that he will pass the course?

a. 0.8186

b. 0.2567

c. 0.7433

d. 0.1814

D

But Why?