SOLUTION: the probability that both Barb and Bob are both on the same committee of 4 which is choosen from their class of 10 people is?

Question 387019: the probability that both Barb and Bob are both on the same committee of 4 which is choosen from their class of 10 people is?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
The number of ways of choosing two more people other than Barb and Bob from 8 people is 8C2 = 28. The total number of ways of choosing 4 people out of ten is 10C4 = 210. Therefore the probability that both Barb and Bob are both on the same committee of 4 is 28/210 = 2/15.
RELATED QUESTIONS
the probability that both Barb and Bob are both on the same committee of 4 which is... (answered by sudhanshu_kmr)

What is the probability that both Barb and Bob are both on the same committee of 4 which... (answered by edjones)

A class of 10 boys and 10 girls a committee of 5 are choosen. What is the probability... (answered by ikleyn,greenestamps)

A safety committee of 2 has to be firmed from 30 studentd. 8 study physics. 10 study... (answered by Boreal)

a president and vice president must be choosen for the executive committee of an... (answered by sudhanshu_kmr)

The probability of being choosen for a dance committee is 3/40. There are 360 students in (answered by checkley71)

In a certain class, 40% of the students are seniors, 15% are failing, and 10% are seniors (answered by stanbon)

a class of 31 students, a committee of 2 is chosen to organize a party What is the... (answered by ikleyn)