A tourist in Las Vegas was attracted by a certain gambling game in which the cus

A tourist in Las Vegas was attracted by a certain gambling
game in which the customer stakes 1 dollar on each play; a win then pays the
customer 2 dollars plus the return of her stake although a loss costs her only
her stake.Las Vegas insiders and alert students of probability
theory know that the probability of winning at this game is 1/4. When driven
from the tables by hunger the tourist had played this game 240 times. Assuming
that no near miracles happened about how much poorer was the tourist upon
leaving the casino? What is the probability that she lost no money?