Concept explainers
Classroom Use A small school has 100 students who occupy three classrooms: A, B, and C. After the first period of the school day, half the students in room A move to room B, one-fifth of the students in room B move to room C, and one-third of the students in room C move to room A. Nevertheless, the total number of students in each room is the same for both periods. How many students occupy each room?
To find: The number of students who will occupy the room.
Answer to Problem 58E
Class A,B,C will be occupied by the 20, 50, 30 students respectively
Explanation of Solution
Given:
Total students are 100.
Three classrooms A, B, C.
Half the students in room A move to room B.
One-fifth of the students in room B move to room C.
One- third of the students in room C move to room A
Total number of students in each room is the same for both the periods.
Calculation:
Let number of students in class A is
From the given condition,
On first period
On the second period,
Total number of students in class A,
Simplify the above expression,
Total number of students in class C,
Simplify the above expression,
Substitute the value of equation (2) and (3) to equation (1),
Substitute the value of equation (4) to equation (2),
Substitute the value of equation (4) to equation (3),
Thus, class A, B, C will be occupied by the 20, 50, 30 students respectively.
Chapter 10 Solutions
Precalculus: Mathematics for Calculus - 6th Edition
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