- #1
Biochemgirl2002
- 30
- 1
- Homework Statement
- According to a report of the Nielson Company, 76% of Internet searches used Google
search engine. If 20 searches are randomly selected, find the probability that
more than 2 did not use Google.
- Relevant Equations
- nCr*0.76^n*0.24^r
i believe that the solution is to do 1- (less than 2 did use google)
so it would look like
1-
((20!/0!20!)0.76^0*0.24^20 +
(20!/1!19!)0.76^1*0.24^19 +
(20!/2!18!)0.76^2*0.24^18)
= 0.99
but logically, this does not make sense to be .99.
what am i doing wrong?
so it would look like
1-
((20!/0!20!)0.76^0*0.24^20 +
(20!/1!19!)0.76^1*0.24^19 +
(20!/2!18!)0.76^2*0.24^18)
= 0.99
but logically, this does not make sense to be .99.
what am i doing wrong?