First slide

Theorems of probability

Question

The probability that a leap year contains 52 mondays and 52 wednesdays is

Easy

A

$\frac{1}{7}$
B

$\frac{2}{7}$
C

$\frac{3}{7}$
D

$\frac{5}{7}$

Solution

$366 d a y s = 52 w + 2 d a y s$
$n (S) = 7, n (A) = 3$

$P (A) = \frac{3}{7}$

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