Problem 1: About 50% of all persons age 3 and older wear glasses or contact lenses. For a randomly selected group of five people find the probability that:(adsbygoogle = window.adsbygoogle || []).push({});

a. exactly three wear glasses or contact lenses

b. at least one wears them

c. at most one wears them

For this problem I set n=5, p=.25, and q(1-p)=.75

For (a) I used y=3, I set up a combination of (5 choose 3) * ((.25)^3) * ((.75)^2)

For (b) and (c) I'm confused as to what I should choose for (y).

Problem 2: If 25% of 11-year old children have no decayed, missing, or filled (DMF) teeth, find the probability that in a sample of 20 children there will be:

a. exactly 3 with no DMF teeth

b. 3 or more with no DMF teeth

c. fewer than 3 with no DMF teeth

d. exactly 5 with no DMF teeth

I set n=20, p=.25, and q(1-p)=.75

I'm not sure if Im setting up these right or not.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Binomial Probability

Loading...

Similar Threads for Binomial Probability |
---|

I Non-countable uniform spaces probability |

I Probability of equally likely events |

A How to calculate the probability of error in an AWGN channel? |

I About binomial statistics |

**Physics Forums | Science Articles, Homework Help, Discussion**