Question

An experiment consists of observing the sum of the dice when two fair dice are thrown. (a). Find the probability that the sum is 7. (b). Find the probability that it will take less than six tosses to throw a 7. (b). Find the probability that it will take more than six tosses to throw a 7.

Answer 1

My Work:

(a) S={{1,1},{1,2},...{6,6}}

(b) Ec={{5,6},{6,5},{6,6}}

(c ) P(Score at most 10)=1-P(greater than 10)=1−336=1112

(d) P(No double thrown)=1-P(Double Thrown)= 1−636=3036=56

(e) I'm not sure how to solve this part. Just looking at the sample space I know it should be 2836 but I want to know how to solve this mathematically.

please mark me as a brainliest answer...