Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n =10, p = 0.1, P(3 or fewe

Question

Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n =10, p = 0.1, P(3 or fewer)

Answer 1

Try looking at this link: http://www.wolframalpha.com/input/?i=binomial+distribution+with+n+%3D10%2C+p+%3D+0.1

 

If you add all of the probabilities together, it should equal one. If you just add the P(0 <= x <= 3) probabilities, you'll get 0.9872.

Answer 2

Some tips:

 

P(3 or fewer) = P(3)+P(2)+P(1)+P(0)

 

P(r) = (n!/r!(n-r)!)(p)^r(1-p)^(n-r)