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# Probability of Occurrence

A. An activity that yields a result or an outcome is called an ____________________.

b. An ________________________is a collection of some of the possible outcomes from the sample space.

c. Two events A, B are to be ____________________if they cannot both occur together when an experiment is performed.

d. Suppose A, B, are events from some sample space. Complete the formula: P(A or B) = _____________________________________________________________

e. Suppose that A is an event in a finite sample space S and each outcome in S is equally likely, Let n(A) represent the number of distinct outcomes in A and n(S) represent the total number of distinct outcomes in S. Complete the formula: P(A)=_______________________________________________________________

f. Let A be an event. Complete with a number:
P(A) + P(&#256;) = ________________________________________________________

g. True or False: The probability for an event A is a non-negative number that is no larger than 1. __________________________________

h. A person purchases a package of 10 ball-point pens which, unknown to the purchaser, contains 4 defective pens. Of the first 2 pens used by the purchaser, find the probability that at least 1 pen is defective.________________________________________

#### Solution Preview

Q4
a. An activity that yields a result or an outcome is called an ______Experiment______________.

b. An _____Event ___________________is a collection of some of the possible outcomes from the sample space.

c. Two events A, B are to be ______an independent_ _____________if they cannot both occur together when an experiment is performed. ...

#### Solution Summary

The probability of occurrence is examined. The activity that yields results are examined.

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