The probability of any given day in the month of May not being a Monday if the 1st day of May is a Monday is ………
A) 1/2
B) 31/6
C) 26/31
D) 5/31
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Correct option is: C) \(\frac {26}{31}\).
If 1st May is Monday then 8th, 15th, 22nd & 29th May are also Monday.
Total Mondays in month of May = 5.
Total number of days in month of May = 31.
\(\therefore\) Probability of choosing Monday in month of May whose 1st day is Monday = \(\frac 5{31}\)
Probability of choosing non-Monday = \(1-\frac 5{31} = \frac {31-5}{31} = \frac {26}{31}\)
Hence, required probability is \(\frac {26}{31}\).
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