Concept explainers
Quiz Grades The average of 5 quiz grades is 10. When the lowest grade is dropped and the new average is calculated, it turns out to be 11- What was the score of the dropped grade? (Mathematics Teacher calendar problem, February 7, 2014)
Airline Fatalities in the United States The table pertains to scheduled commercial carriers. Fatalities data include those on the ground except for the September 11, 2001 terrorist attacks. Use this information for Exercises 11-16.
U.S. Airline Safety, 1999-2008 | |||
Year | Departures (in millions) | FatalAccidents | Fatalities |
1999 | 10.9 | 2 | 12 |
2000 | 11.1 | 2 | 89 |
2001 | 10.6 | 6 | 531 |
2002 | 10.3 | 0 | 0 |
2003 | 10.2 | 2 | 22 |
2004 | 10.8 | 1 | 13 |
2005 | 10.9 | 3 | 22 |
2006 | 10.6 | 2 | 50 |
2007 | 10.7 | 0 | 0 |
2008 | 10.6 | 0 | 0 |
Source: The World Almanac and Book of Facts 2010. |
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