1) six people are chosen at random. what is the probability that at least two of them were born on the same day of the week? the probability that at least two of the people were born on the same day of the week is
2
let s be a sample space and e and f be events associated with s. suppose that
pr left parenthesis upper e right parenthesis equals one thirdpr(e)=13 ,
pr left parenthesis upper f right parenthesis equals three eighthspr(f)=38 ,
and
pr left parenthesis upper e union upper f right parenthesis equals two thirdspr(e? f)=23.
calculate the following probabilities.
a. (e? f)
b. pr(ef)
c. pr(fe)