It rains 3 days a week. When it rains there is Thunderstorm.
The probability of Thunderstorm falling on the ground is 1/42000.
A Golfer plays golf on Saturday and Sunday. What is the probability of Thunderstorm falling on that Golfer?

• 1/49000
  prob of rain in one day 3/7
  prob of thunder falling on ground (3/7)*(1/42000)
  golfer plays 2 days a week.
  so, 2*(3/7)*(1/42000)
  ans:1/49000
• 11 years agoHelpfull: Yes(8) No(11)
• Total possibiliteis of days on which rain occurs = 7C3
  Total possiblities containing Sunday or Saturday as one of the days = 7C3-5C3
  Probiabiltiy that the thunderstorm occurs on the Sundays and Saturdays = (7C3-5C3)/7C3
  Probablitlity tha thuder storms occur on that day =
  (7C3-5C3)/7C3 * 1/42000= 25/35*1/42000 = 5/294000
  
• 11 years agoHelpfull: Yes(5) No(0)