Savita and Hamida are friends. What is the probability that both will have same birthday ? different birthday ? (ignoring a leap year).

Explanation

`1 year = 365 days`

`S -> 365 days`

`H -> 365 days`

`S & H = 365 xx 365`

(i) Same day `= 365 xx 1 = 365`

(ii) Different Day `= 365 xx (365-1) = 365 xx 364 `

P(same day) =`365/(365 xx 365) = 1/365`

P(different day) =`(365 xx 364)/(365 xx 365) = 364/365`

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