if the probability of rain on any given day in pune city is 50% then what is the probability that it rains on exactly 3 days in a 5 day period?

• 5c3*(1/2)^5 = 10/32(selection of 3 days from 5 =5C3; probability of rainfall on each day = 1/2 => ans:5C3*(1/2)^5 )
• 14 years agoHelpfull: Yes(85) No(10)
• probability it rains on 1st day=1/2
  probability it rains on 2nd day=1/2
  probability it rains on 3rd day=1/2
  probability it rains on 4th day=1/2
  probability it rains on 5th day=1/2
  Probability of rain in any day of 5day period=1/32
  probability that it rains on exactly 3 days in a 5 day period=5c3*(1/32)=10/32=5/16
• 14 years agoHelpfull: Yes(41) No(1)
• subhojit great..............the persons who are talking that ur ans is wrong are simply called donkey
• 14 years agoHelpfull: Yes(11) No(7)
• since for probability for the rain in on day is=>>1/2
  so for 5 days it would be=>>(1/2)^5=1/32
  but we have to find the probability when it rains exactly on three days in 5 days
  so,req. probability is=5C3*(1/32)
  =10/32
  =5/16
• 13 years agoHelpfull: Yes(7) No(1)
• 5c3*(1/2)^3 bcoz rain occurs in only 3 days...
• 14 years agoHelpfull: Yes(5) No(3)
• Garapati anusha devi, probability can never be greater than 1. That's the very basic thing you missed to notice.
• 8 years agoHelpfull: Yes(1) No(0)
• ANS:5/4
  In 5 days we can have rain fall in any 3 days.
  for choosing that 3 days= 5c3=10
  in that 3 days we have half of chances to get rain fall.(1/2)^3
  so ans 10*(1/8)=5/4.
  
• 9 years agoHelpfull: Yes(0) No(4)
• 5/16
  ,i got
• 6 years agoHelpfull: Yes(0) No(0)