Homework Help: statistics

Posted by vee-please help, asap on Monday, October 3, 2011 at 11:28am.

According to the National Transportation Safety Board, 10% of all major automobile crashes result in serious injury to at least one person involved in the crash. The Georgia Department of Transportation reports that there are approximately 20 major automobile crashes per month in the Metro Atlanta area.

c. What is the probability that, in 20 major crashes, no serious injuries occur?

d. What is the probability that, in 20 major crashes, at least one serious injury occurs?

statistics - PsyDAG, Monday, October 3, 2011 at 1:06pm
c. (1-.10) *20 = ?

d. .10 * 20 = ?

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