Carcass wrote:
In 1979 approximately 1/3 of the 37.3 million airline passengers traveling to or from the United States used Kennedy Airport. If the number of such passengers that used Miami Airport was 1/2 the number that used Kennedy Airport and 4 times the number that used Logan Airport, approximately how many millions of these passengers used Logan Airport that year?
(A) 18.6
(B) 9.3
(C) 6.2
(D) 3.1
(E) 1.6
This question illustrates the importance of
ALWAYS checking the answer choices BEFORE getting bogged down with time-consuming calculations.
Since the answer choices are VERY spread apart, we can be quite aggressive in our rounding and estimation.
In 1979 approximately 1/3 of the 37.3 million airline passengers traveling to or from the United States used Kennedy Airport. Let's say that "In 1979 approximately 1/3 of the
36 million airline passengers traveling to or from the United States used Kennedy Airport. "
1/3 of 36 =
12So,
12 million passengers used Kennedy Airport
The number of such passengers that used Miami Airport was 1/2 the number that used Kennedy Airport 12 million passengers used Kennedy Airport
1/2 of
12 million =
6 millionSo,
6 million passengers used Miami Airport
The number of such passengers that used Miami Airport was 4 times the number that used Logan AirportIn other words, the number of such passengers that used Logan Airport was
1/4 the number that used Miami Airport
1/4 of
6 million =
1.5 million So,
1.5 million passengers used Logan Airport
Check the answer choices . . . only answer choice E is close to
1.5Answer: E
_________________
Brent Hanneson - founder of Greenlight Test Prep