Posted by **Lisa** on Monday, October 1, 2012 at 9:32pm.

in a health study, 18% of americans are underweight. If 4 americans are randomly selected, what is the probability that at least one will be underweight?

- probability -
**Reiny**, Monday, October 1, 2012 at 9:42pm
prob(underweight) = .18

prob(NOT underweight) = .82

Prob(at least one underweight)

= 1 - prob(all 4 not underweight)

= 1 - .82^4

= .5478..

or appr 55%

here is a more detailed version of your question back from 2009

http://www.jiskha.com/display.cgi?id=1233928692

- probability -
**Lisa**, Tuesday, October 2, 2012 at 10:04am
Thank you so much for taking the time to help me.

## Answer This Question

## Related Questions

- pre statistics - In a recent health study it was claimed that 18% of americans ...
- math,pre statistics - In a recent health study it was claimed that 18% of ...
- statistics - if 18% of all Americans are underweight, find the probability that ...
- Statistics - A consumer protection group reports that 25% of 5-lb bags of sugar ...
- Health - Bulimia can be difficult to discover because most sufferers hide there ...
- MATH - In a study 42% of adults questioned reported that their health was ...
- math (stats) - According to Masterfoods, the company that manufactures M&M’s, 12...
- Statistics 2 please give answers to the below ques - According to a study ...
- Health - The U.S. government categorizes body weight status as ________. A. ...
- Health - The U.S. government categorizes body weight status as ________. A. ...

More Related Questions