Question

There are 27 students each preparing a presentation. There are 3 students presenting each day. If you choose 3 students randomly, what is the probabil

Answer 1

9 this is your answer

Answer 2

Answer: 1/2925 or 0.00034188 in decimal form.

Step-by-step explanation:

- There are 27 students where 3 are presenting each day. The probability of choosing a student presenting on the first try is

3/27 = 1/9

- If the first student chosen is presenting, the probability of choosing another presenting is

(3-1) / (27-1) = 2/26 = 1/13

- If the first and second students chosen are presenting, and the probability of choosing a third presenting is

(2-1) / (26-1) = 1/25

- The probability of all presenting is

P(3 P ) = 1/9 * 1/13 * 1/25 = 1/2925