pre statistics
posted by Angela .
In a recent health study it was claimed that 18% of americans are underwieght.If 4 americans randomly selected what is the probability that
a. that all will be underweight
b.none will be underweight
c. at least one will be underweight

pre statistics 
bobpursley
pr(a.)=18/100*18/100*18/100*18/100
I will be happy to check the others. On the last, remember there are four ways the combination can occur 
pre statistics 
bobpursley
Sorry, on the last, you could have
4 ways to have one underweight
UFFF, FUFF, FFUF, FFFU
Ways to have two U
UUff, UfUf, UffU, FUUf, FUfU, FfUU
Ways to have three U
UUUf, UfUU, FUUU, UUfU
Ways to have four U.
UUUU
Respond to this Question
Similar Questions

math,pre statistics
In a recent health study it was claimed that 18% of americans are underwieght.If 4 americans randomly selected what is the probability that a. that all will be underweight b.none will be underweight c. at least one will be underweight 
statistics
if 18% of all Americans are underweight, find the probability that if three Americans are selected at random all will be underweight. 
Statistics
A consumer protection group reports that 25% of 5lb bags of sugar of a certain brand are underweight. Three bags of sugar are selected at random. Assume that the report is correct. a. What is the probability that all three bags are … 
Health
The U.S. government categorizes body weight status as ________. A. Underweight, healthy weight, overweight, obese B. Healthy, unhealthy C. Underweight, healthy, overweight D. Thin, healthy, heavy, obese 
Health
The U.S. government categorizes body weight status as ________. A. Underweight, healthy weight, overweight, obese B. Healthy, unhealthy C. Underweight, healthy, overweight D. Thin, healthy, heavy, obese I HAVE NO CLUE PLEASE HELP OR … 
probability
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? 
Health
The U.S. government categorizes body weight status as ________. A. Underweight, healthy weight, overweight, obese B. Healthy, unhealthy C. Underweight, healthy, overweight D. Thin, healthy, heavy, obese 
Health
Bulimia can be difficult to discover because most sufferers hide there condition and they tend to be a normal weight, sometimes overweight*** severely underweight slightly underweight obese 
statistics
In a study, 35% of adults questioned reported that their health was excellent. A researcher wishes to study health of people living close to a nuclear power plant. Among 14 adults randomly selected from this area, only 3 reported that … 
statistics
In a study, 35% of adults questioned reported that their health was excellent. A researcher wishes to study health of people living close to a nuclear power plant. Among 14 adults randomly selected from this area, only 3 reported that …