Questions
The probability that in a family of five members, exactly two members have birthday on Sunday is
detailed solution
Correct option is D
A person can have his/her birthday on any one of the seven days of the week. So 5 persons can have their birthdays in 75 ways. Out of 5, three persons can have their birthdays on days other than Sundays in 63 ways and other 2 on Sundays. Hence, the required probability is= 5C2×6375=10×6375(Note that 2 persons can be selected out of 5 in 5C2 ways.)Talk to our academic expert!
Similar Questions
A bag contains 10 different balls. Five balls are drawn simultaneously and then replaced and then seven balls are drawn. If the probability that exactly three balls are common to the two draws is p, then the value of 8p is ________.
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