DIE AND COINS

Alice throws a die. If she gets a 5 or a 6, she tosses three coins and notes the number of heads. Out of these three coins, one is a two-headed-coin and the rest of the two are biased coins each showing heads 75% of the time.

If she gets 1,2,3, or 4, she tosses two coins, one biased (showing heads 75% of the time) and one fair coin, noting whether a head or a tail is obtained.

After Alice throws the die once, she obtains exactly one head. Then if the probability that she threw 1,2,3 or 4 with the die is \(\frac{m}{n}\) where \(m\) and \(n\) are coprime positive integers, what is the value of \(m+n?\)

×

Problem Loading...

Note Loading...

Set Loading...