Question 1140573
find probability don't roll it at all or 1 time only.
not at all is (5/6)^8=0.2326
roll it once is 8*1/6*5/6^7, the 8 being the number of ways it can occur.
this probability is 0.3721
both are 0.6047
we want the complement of that, which is 1-0.6047=0.3953.