Maths: Probability

Question

Consider that, there are 365 days in a year, what is the probability that exactly two out of   ten  people are born on the same day?

Comments

@Srestha @sid
that is ok, but that shouldn't be 365/365*1/365*364/365............ and so on? why is the sample space 364^(r-2)?

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yes its correct ...  it should be rc2 /365. for remaining sample space 364^(r-2)

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@Manu thakur

where r u getting this ? 365/365*1/365*364/365. ........

Can u tell a bit more?

because I am not getting this line