McGraw Hill Glencoe Algebra 1, 2012
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McGraw Hill Glencoe Algebra 1, 2012 View details
Preparing for Standardized Tests
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Exercise 1 Page 819

We are told that there are students, camp counselors, and teachers at Camp Kern. There are three activities that a person can do: hiking, horseback riding, and a canoe trip. Each person is assigned to only one of these activities. Let's make a two-way table to organize the given information.

Hiking Horseback Riding Canoe Trip Total
Student
Camp Counselor
Teacher

Since we know the total number of students, camp counselors, and teachers, we can calculate the missing data.

Hiking Horseback Riding Canoe Trip Total
Student
Camp Counselor
Teacher
We will find the probability of a randomly selected person being a student on the canoe trip or a camp counselor horseback riding The events and are mutually exclusive. Therefore, the probability of selecting a student on the canoe trip or a camp counselor on a horse is the sum of their individual probabilities.
Let's first calculate the probability of This probability can be found by the ratio of the number of students on the canoe trip to the total number of people at the camp.
Looking at the table, we will substitute the values into this ratio and calculate it.
Let's now calculate the probability of a randomly selected person being a camp counselor riding a horse by the same method used to find
Using the table, we will substitute the values into the ratio and calculate
Finally, we will substitute the ratios and into the equation and solve it for
The probability that a randomly selected person will be a student on a canoe trip or a camp counselor riding a horse is