If you ask three strangers on campus, what is the probability: (b) All were born on different days of weeks?

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If you ask three strangers on campus, what is the probability: (b) All were born on different days of weeks?

2006-09-21 12:06:34 · 5 answers · asked by genious_mind_1 1 in Science & Mathematics ➔ Mathematics

5 answers

Each day has 1/7 probability of being born on it so that makes 6/7 chance of not being born on it.

The joint probability is 6/7 x 6/7 x 6/7 = 216/343 = 63%

2006-09-21 12:09:35 · answer #1 · answered by Rich Z 7 · 0⤊ 2⤋

1/6

2006-09-21 12:18:44 · answer #2 · answered by Vera 3 · 0⤊ 0⤋

1*6/7*5/6=30/42=5/7?

2006-09-21 12:11:32 · answer #3 · answered by Anonymous · 0⤊ 0⤋

216 out of 343

2006-09-21 12:09:54 · answer #4 · answered by t_nguyen62791 3 · 0⤊ 2⤋

1*(6/7)*(5/7)=61.2% chance

2006-09-21 12:11:10 · answer #5 · answered by bruinfan 7 · 1⤊ 0⤋