2. During a Techno-Geek-Store sale 6 blank video tapes and 12 blank DVD's cost $35.10. During the same sale, 8 blank video tapes and 3 blank DVD's cost $27.95. What was the cost of a blank video tape and the cost of a blank DVD?​

Answer

Given

the relative frequency tables in the figure below (Note: the tables are not in the same order as in the problem statement)

Find

which table is best suited to answer the question

A) the percentage of home viewers who prefer to watch horror movies

B) the percentage of people surveyed who prefer to watch comedy movies at home

C) the percentage of viewers with a preference for drama who watch at the theater

Solution

The figure shows the best choices for answering A, B, and C.

table 2 is best for A (it is normalized by viewing location)

table 3 is best for B (it is normalized over the whole sample)

table 1 is best for C (it is normalized by genre)