
Probability and Statistics Basic Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
May 4th, 2018, 02:12 AM  #1 
Senior Member Joined: Jul 2011 Posts: 400 Thanks: 15  probability problem
a Dice is thriwn $31$ times. Then probability of getting $2,4$ and $5$ at most $15$ times, is

May 4th, 2018, 05:26 AM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,320 Thanks: 936  
May 4th, 2018, 09:22 AM  #3 
Senior Member Joined: Sep 2015 From: USA Posts: 2,124 Thanks: 1103 
$\sum \limits_{k=0}^{15}~\dbinom{31}{k}\left(\dfrac 1 2\right)^{31} = \dfrac 1 2$


Tags 
probability, problem 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Probability problem  VarunSoon  Advanced Statistics  2  November 6th, 2017 12:47 PM 
Probability Problem / Insurance problem  bsjmath  Advanced Statistics  2  March 1st, 2014 02:50 PM 
Probability problem.  Kane535  Probability and Statistics  2  May 16th, 2010 02:49 AM 
Probability Problem  wulfgarpro  Probability and Statistics  4  March 29th, 2010 07:58 PM 
Probability Problem  Recipe  Probability and Statistics  8  March 20th, 2010 02:48 PM 