There are 3 math teams in the area, with 5, 7, and 8 students respectively. Each team has two co-captains. If I randomly select a team, and then randomly select two members of that team to give a book, what is the probability that both of the people who receive books are co-captains?
+118609 Let team A have 5 members 2 of which are captains.
Let team B have 7 members 2 of which are captains.
Let team C have 8 members 2 of which are captains.
the probability of choosing team A then a captain from it then another captain from it is
\(\frac{1}{3}*\frac{2}{5}*\frac{1}{4}=\frac{1}{30}\)
Now do the same thing for team B and for Team C and then add all those probabilities together.
This is a teaching answer - please let guest asker finish it for him/herself.
+118609 Let team A have 5 members 2 of which are captains.
Let team B have 7 members 2 of which are captains.
Let team C have 8 members 2 of which are captains.
the probability of choosing team A then a captain from it then another captain from it is
\(\frac{1}{3}*\frac{2}{5}*\frac{1}{4}=\frac{1}{30}\)
Now do the same thing for team B and for Team C and then add all those probabilities together.
This is a teaching answer - please let guest asker finish it for him/herself.
