# Calculating the Probability

An instructor has a test bank consisting of 300 easy true-false questions, 200 difficult true-false questions, 500 easy multiple choice questions and 400 difficult multiple choice questions.

If a question is selected at random from the test bank, what is the probability that it will be:

a) An easy question

b) An easy multiple choice question

c) An easy question, given that it is a multiple choice question.

https://brainmass.com/statistics/probability/calculating-probability-situation-3064

#### Solution Preview

Total number of questions

= 300 + 200 + 500 + 400

= 1400

a) Number of easy questions: 300 + 500

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#### Solution Summary

The solution calculates the probability from a given situation.

$2.49