Question

In a contest, 2 students out of 5 are to be chosen for a final playoff. All students have an equal chance of wining. The students include 4 girls and 1 boy.
a. In how many ways can 2 finalists be chosen?
b. Find the probability that the finalists are 1. 2 girls 2. a girl and a boy 3. 2 boys 4. 2 specific girls
c. Find the probability that one of the finalists are a specific girl

Answer 1

a. 20

Answer 2

errr show th work please?

Answer 3

wait, that answer is wrong.

Answer 4

5C2 actually, so 10.

Answer 5

b.
1. (4/5)*(3/4)
2.(4/5)*(1/4)+(1/5)*(4/5)
3. come one? two boys? seriously? -_-
4.(1/5)*(1/4)*2

Answer 6

c. 1*(1/5)+(1/5)*1=2/5

Answer 7

Are you sure a is not 5P2?

Answer 8

Yes, because emily and mary= mary and emily.