Explain probability of 5 Sundays in the month of January
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the remaining 3 days can have different combination of days
sun-mon-tue
mon-tue-wed
tue-wed-thu
wed-thu-fri
thu-fri-sat
fri-sat-sun
sat-sun-mon
so there are total 7 combinations and 3 of these combinations contains sunday
so probability of having 5 sundays in the month of january is P(E)= 3/7
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