There are 4 people in a room. What’s the probability that there
are two people born...
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There are 4 people in a room. What’s the probability that thereare two people born on the same day of the week? (Assume allbirthdays are independent and are uniformly distributed over theseven days of the week.)
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There are 4 people in a roomWe have to find the probability that there are twopeople born on the same day of the weekNow there are 7 days in the weekSo the first person can have birthday on any 1 of the 7daysFor any of these 7 choices
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