Originally Posted by

**the-G** These questions are to be done on a graphing calculator. The questions give n, p, x but I am having difficulty figuring out what is what.

1. In a history class, Colin and Diana both write a multiple choice quiz. There are 10 questions. Each question has five possible answers. What is the probability that:

a) Colin will pass the test if he guesses an answer to each question.

b) Diana will pass the test if she studies so that she has a 75% chance of answering each question correctly.

I really don't have a clue on how to approach these types of questions, any help would be really appreciated

thanks

~G