Tuesday
August 4, 2015

Homework Help: Stats

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?

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