Bob says to no one in particular Did you know that the proba

Bob says to no one in particular, “Did you know that the probability that you will get at least one “5” in three rolls of a pair of dice is slightly less than 1/2. On the other hand, the probability that you’ll get at least one “5” in six rolls of the dice is
just over 1/2.” Is Bob on target, or out to lunch?

Solution

P(1st) = 1- P(no five) = 1-5/6*5/6*5/6= 0.4213

P(2nd) = 1- P(no five)=1-(5/6)^6= 0.665

yes,bob can be said to be on target