1. There are eleven seniors and five juniors who are sprinters in Sta. Lucia High School track team. The coach must select four sprinters torun the 800-meter relay race. What is the probability that the twoseniors and the two juniors will be chosen for the relay team?.
The probability will be given by the quotient between the combinations that have 2 seniors and 2 juniors (the number we got above) and the total number of combinations. This is:
