Probability (1 Viewer)

[Teoh]

This is probably more a 3 unit question, but probability isn't computing

Sophia, Gabriel and Elizabeth take their driving test. The chances that they pass are 1/2, 5/8 and 3/4 respectively.
Find the probability that exactly one of the three passes.

 

[withoutaface]

1/2*3/8*1/4+1/2*5/8*1/4+1/2*3/8*3/4

 

[cj_bridle]

(1/2 x 3/8 x 1/4) + (1/2 x 5/8 x 1/4) + (1/2 x 3/8 x 3/4) = [edit] 17/64

taking the probabilities of one passing then the other 2 failing.. then changing who passes.. then adding those 3 together.

[edit] beat me biatch

[edit2] sorry my calculating was a bit off the algorithm is right answer is = 17/64

 

[Teoh]

Hmm the answer is 17/64...

 

[cj_bridle]

sorry my dodgy calculating was off.. the algorithm is right.. just calculated wrong.. that does give 17/64