3 years ago

Somebody please help not that much time left

Mathematics

2 answers:

timurjin [86]3 years ago

8 0

-i hope this helps buddy

sdas [7]3 years ago

6 0

-i i think took me a while but i hope it helps

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Answer:

(a) 1 in 365 or 0.2740%

(b) 0.8227%

Step-by-step explanation:

(a) For any given birthday date of the first person, there is a 1 in 365 chance that the second person shares the same birthday, therefore the probability that the first two people share a birthday is:

$P = \frac{1}{365}=0.2740\%$

(b) There are four possibilities that at least two people share a birthday, first and second, first and third, second and third, all three share a birthday. Therefore, the probability that at least two people share a birthday is:

$P =3* \frac{1}{365}+ (\frac{1}{365})^2\\ P=0.8227\%$