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Probability
Classical Probability
JEE Main 2020
Grade 12

Question:

The probability that a leap year selected at random will have 53 Sundays is:
(1) $\frac{1}{7}$
(2) $\frac{2}{7}$
(3) $\frac{3}{7}$
(4) $\frac{1}{53}$

Step-by-Step Solution

Key Concept: A leap year has 366 days, i.e. 52 complete weeks plus 2 extra days — list the possible pairs these 2 extra days can form and count how many of them include a Sunday.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: (2)

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