SOLUTION: The school wants to have all of the students enrolled in social studies classes read the same book at the same time so that the author of the book can speak to the students at a

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Question 672298: The school wants to have all of the students enrolled in
social studies classes read the same book at the same
time so that the author of the book can speak to the
students at an assembly. The school originally purchased
two classroom sets of 30 books each, but now one set is
missing 3 books and the other is missing 5. For which
of the following class periods, if any, are there NOT
enough books available for each student to have one
book?
A. Period 2 only
B. Period 3 only
C. Period 4 only
D. Period 3 and 4 only
E. There are enough books for each class period
Answer by MathLover1(20855) About Me  (Show Source):
You can put this solution on YOUR website!
The correct answer is B.
The total number of books available is %2830-3%29%2B%2830-5%29, or 27%2B25,which is 52. To find the class periods for which there are not enough books, find the total number of books needed for each+period, as given in the table below.
PERIOD------------------ 1 --------2----+3---- 4----- 5+
BOOKS NEEDED--------- 23------ 49---+56--- 50----+27
The only entry in the table with more than+52 is 56 for period 3. If you selected answer choice E, you probably used 60 as the number of available books and did+not+take+into account the 8+missing+books.