TAILIEUCHUNG - Brownstein S., et al. Barron's GRE.12th.ed.(Barrons)(669s)(1997) Episode 2 Part 2

Tham khảo tài liệu 'brownstein s., et al. barron's .(barrons)(669s)(1997) episode 2 part 2', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 352 Mathematics Review indicated by a 25 in the circle at the right since 80 owned a TV. Therefore 30 owned either a car or a TV but not both. If an orange costs 200 and an apple costs 120 what is the ratio of the cost of an orange to the cost of an apple D-2 If an event can happen in m different ways and each of the m ways is followed by a second event that can occur in k different ways then the first event can be followed by the second event in m k different ways. This is called the fundamental principle of counting. If there are 3 different roads from Syracuse to Binghamton and 4 different roads from Binghamton to Scranton how many different routes are there from Syracuse to Scranton that go through Binghamton The ratio is I or 5 3. Notice that the ratio of the 120 3 cost of an apple to the cost of an orange is I or 3 5 so the order of the terms is important. A ratio is a number therefore if you want to find the ratio of two quantities they must be expressed in the same units. -----------------------------------------------. What is the ratio of 8 inches to 6 feet There are 3 different ways to go from Syracuse to Binghamton. Once you are in Binghamton there are 4 different ways to get to Scranton. Using the fundamental principle of counting you will find that there are 3x4 12 different ways to get from Syracuse to Scranton going through Binghamton. A club has 20 members. They are electing a president and a vice president from the members at large there is no slate of nominees. How many different outcomes of the election are possible Assume the president and vice president must be different members of the club. There are 20 members so there are 20 choices for president. Once a president is chosen 19 members are left who can be vice president. Thus there are 20 19 380 different possible outcomes of the election. Il-E. Ratio and Proportion F-1 Ratio. A ratio is a comparison of two numbers by divi- sion. The ratio of a to b is written asa b ệ a-ỉ-b. b We can handle

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