Posted by **Traci** on Sunday, February 20, 2011 at 9:42pm.

40 students live in a dormitory. 5 have swine flu. If 4 students are selected at random, what is the probability that 1 or 2 of the 4 have swine flu?

- Probability -
**drwls**, Sunday, February 20, 2011 at 10:36pm
Probability of 0: (35/40)(34/39)(33/38)(32/37) = 0.5729

Probability of 4: (5/40)*(4/39)*(3/38)*(2/37) = 120/2,193,360 = 0.000055

Probability of 1:

4*(35/40)*(34/39)*(33/38)*(5/37)= 0.3581

Probability of 2:

(4!/(2!*2!))(35/40)*(34/39)*(5/38)*(4*37)= 0.0651

## Answer This Question

## Related Questions

- Statistic - According to the CDC, 25 % of college students get the flu every ...
- swine flu - where would i be able to find the current morbidity and mortality ...
- Current Events - Which do you feel in your personal opinion is/was more ...
- Probability - According to the record of the registrar's office at a state ...
- 5th grade - how did the swine flu start
- Statistics - According to the record of the registrar's office at a state ...
- college math - biostatistics - hey... first time user and really lost. wondering...
- statistics - Based on data from a statistical abstract, only about 12% of senior...
- Stat. - A national health organization predicts that 20% of American adults will...
- english - how has technology played a role in the swine flu...

More Related Questions