Probability problems
Posted: Sun Sep 07, 2008 12:04 am
Hi Dear,
In my opinion, probability problems are the most time consuming problems. I hate these problems so much because we have to pay much attention for every word when reading . My goal for this topic is we should review some basic formulas and post some problems to get used to the techniques
Okie, I post the first problems so that we can discuss :
Problem 35 - GR0568
At a banquet, 9 women and 6 men are to be seated in a row of 15 chairs. If the entire seating arrangement is to be chosen random, what is the probability that all the men will be seated next to each other in 6 consecutive positions?
a. 1/ (15 C 6) - where n C k = n!/[k!(n-k)!]
b. 6!/(15 C 6)
c. 10!/15!
d. 6!9!/14!
e. 6!10!/15!
In my opinion, probability problems are the most time consuming problems. I hate these problems so much because we have to pay much attention for every word when reading . My goal for this topic is we should review some basic formulas and post some problems to get used to the techniques
Okie, I post the first problems so that we can discuss :
Problem 35 - GR0568
At a banquet, 9 women and 6 men are to be seated in a row of 15 chairs. If the entire seating arrangement is to be chosen random, what is the probability that all the men will be seated next to each other in 6 consecutive positions?
a. 1/ (15 C 6) - where n C k = n!/[k!(n-k)!]
b. 6!/(15 C 6)
c. 10!/15!
d. 6!9!/14!
e. 6!10!/15!