First slide

Theorems of probability

Question

The probability of getting a total score of 7 when two unbiased dice are thrown simultaneously is

Easy

A

$\frac{7}{36}$
B

$\frac{29}{36}$
C

$\frac{1}{6}$
D

$\frac{5}{6}$

Solution

$A = {(1, 6) (2, 5) (3, 4) (6, 1) (5, 2) (4, 3)}$
$n (A) = 6$
$n (S) = 36$
$P (A) = \frac{n (A)}{n (s)} = \frac{6}{36} = \frac{1}{6}$

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