If the probability of an impossible event is 0 and a certain event is 1, what is the probability that a leap year selected at random contains exactly 53 Sundays?

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A 1/7
B 2/7
C 3/7
D 53/366

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Answer: B. 2/7

• Answer: B) 2/7
• Explanation: A leap year has 366 days, which equals 52 weeks and 2 extra days. These 2 extra days can be (Sun/Mon, Mon/Tue, Tue/Wed, Wed/Thu, Thu/Fri, Fri/Sat, Sat/Sun). Out of 7 possibilities, 2 contain Sunday.

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If the probability of an impossible event is 0 and a certain event is 1, what is the probability that a leap year selected at random contains exactly 53 Sundays?

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