Thursday

July 24, 2014

July 24, 2014

Posted by **Sherri** on Sunday, December 14, 2008 at 3:10pm.

I think that the answer is:

(0.23)(0.23)(.00003404)= .000001801

is the right?

*round your answer to 3 significant digits*

- math- statistics -
**Damon**, Sunday, December 14, 2008 at 3:25pmp of drowning = .23

1-p = prob of not drowning = .77

In general the probability of k hits in n trials is

C(n,k) p^k (1-p)^(n-k)

(binomial random variable )

so here we want

C(7,4)* .23^4 * .77^3

C(7,4) from Pascal's triangle of combination formula = 35

so

35 * .23^4 * .77^3 = .0447

- math- statistics -
**Sherri**, Sunday, December 14, 2008 at 7:28pmthank you so much!!!

**Related Questions**

AP Statistics - if the probability of a swan drowning is .27, find the ...

Math - Statistics - I roll 12 4-sided dice. What is the probability that I roll ...

statistics - Consider a binomial experiment with 20 trials and probability 0.45 ...

statistics - Consider a binomial experiment with 20 trials and probability 0.45 ...

statistics - I am having trouble figuring out how to do this type of problem. ...

statistics - The number of independent errors in a transmitted message of n ...

statistics - Consider a binomial experiment with 20 trials and probability 0.45...

Probability and statistics - 8. A random variable X takes exactly the 5 values 1...

statistics - Find the indicated binomial probabilities. Round to the nearest 3 ...

statistics math - The unemployment rate is 5.8% (Bureau of Labor Statistics, ...