A) \[\frac{2}{7}\]
B) \[\frac{3}{7}\]
C) \[\frac{4}{7}\]
D) \[\frac{1}{7}\]
Correct Answer: B
Solution :
There are 366 days in a leap year, in which 52 weeks and two days, The combination of 2 days ? Sunday ? Monday, Monday ? Tuesday, Tuesday ? Wednesday, Wednesday ? Thursday, Thursday ? Friday, Friday ? Saturday, Saturday ? Sunday P(53 Fridays) = \[\frac{2}{7}\]; P(53 Saturdays) \[=\frac{2}{7}\] P(53 Fridays and 53 Saturdays) \[=\frac{1}{7}\] \ P(53 Fridays or Saturdays) = P(53 Fridays) + P(53 Saturdays) ? P(53 Fridays and Saturdays) \[=\frac{2}{7}+\frac{2}{7}-\frac{1}{7}\] \[=\frac{3}{7}\].
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