Posted by **Trisha** on Tuesday, July 31, 2012 at 2:01am.

The probability that Aaron sees Hannah on any given day is 1/2. What is the probability that he sees her 3 out of all 5 days this week?

- Math -
**MathMate**, Tuesday, July 31, 2012 at 7:10pm
If we can assume random trials, and that probability remains constant (at 1/2).

Use binomial distribution.

N=5 (no. of trials),

n=3 (no. of successes),

p=1/2 (probability), q=(1-p)=1/2

P(3 out of 5)

=C(5,3)p^3q^(5-3)

=5!/(2!3!) (1/2)^3(1/2)^2

=10/32

=5/16

## Answer This Question

## Related Questions

- Math - Trudi Can Either Walk TO School, Or She Can Take The Bus. The ...
- Math- probability - In a city, every day is either cloudy or sunny (not both). ...
- probability - for a small regional airline, the number of claims for missing ...
- math-probability - betsy goes running 2 days out of 7 and james goes running 5 ...
- Maths - - In a normal pack of cards, write down the odds against picking each ...
- Probability - Before leaving for work, Victor checks the weather report in ...
- Probability - A man has 10 ties to choose from. He wears a tie each day to work...
- Probability - A man has 10 ties to choose from. He wears a tie each day to work...
- Math - A biologist has determined that a particular osprey has a 70% chance of ...
- statistics - A life insurance salesman sells on the average 3 life insurance ...

More Related Questions