Question

In June 1990, a small academic press published an initial run of 2,500 copies of linguist Chloe Vermeulen’s first book, Speech and Speaking. Because the first run was selling well, a second, larger run was produced in June 1995. Total sales for the period from June 1995–June 2000 represented an increase of 52 percent over total sales for the preceding five years; by June 2000, Vermeulen’s book had sold a total of 3,843 copies. In 2000, Speech and Speaking was cited in an influential paper; subsequently, for the period June 2000–June 2005, sales of Vermeulen’s book were double the sales for the previous five-year period.

In the table, identify the number of books that most closely approximates the total sales of Speech and Speaking for each of the five-year periods June 1990–June 1995 and June 2000–June 2005, based on the information given. Make only two selections, one in each column.
A) June 1990–June 1995
B) June 2000–June 2005
C) Total sales for the period

Answer 1

A) 1525

B) 4636

C) 8479

Explanation:

Lest say that The book had been sold x copies in the period of June 1990-June 1995. And we know that the book had been sold 152*x/100 copies in the period of June 1995–June 2000. By June 2000 in total 3843 book had been sold. Therefore number of the copies that sold in the period of June 1990-June 1995 is:

`252*x/100=3843\\x=1525`

number of the copies that sold in the period of June 1995-June 2000 is:

`152*x/100=2318`

For the period June 2000–June 2005 2318*2=4636 book had been sold.