Im not sure just give me a minute
Cathy drank 1,000 ml of water which means she drank 1 liter.
Make it in exactly five steps.
Hope this helps.
Expected number of wins=number of plays times the probability of winning
w=20(14.5/100)
w=20(0.145)
w=2.9
w≈3
So you would expect to win 3 times out of 20 attempts (rounded to the nearest whole number of wins)