Teesha is in the French club. There are 31 students in the club. The French teacher will pick two students at random to guide visiting students from France. What is the probability that Teesha will be picked as a guide? Hint: Teesha must be picked first or second.

1/30

30/31

1/930

2/31

Question

Teesha is in the French club. There are 31 students in the club. The French teacher will pick two students at random to guide visiting students from France. What is the probability that Teesha will be picked as a guide? Hint: Teesha must be picked first or second.

1/30

30/31

1/930

2/31

anonymous · Answer

What is the probability she will be picked first?

anonymous · Answer

Then add the probability that she will be picked second.

anonymous · Answer

different ways to do it, first find ways to select 2 students from 31 which is 31  C   2
Then say you pick Teesha, a new person can be selected from remaining 30 students in  30 C  1, that should be the answer

directrix · Answer

See solution of same problem at the following link: http://openstudy.com/study#/updates/4fc7c966e4b022f1e12f40cd

anonymous · Answer

cwrw's method is the same as I proposed.