Chapter - probability

Dear Student,
Solution) A die is rolled once. So, total outcomes (1, 2, 3, 4, 5, 6) is 6
(i) 3 
Favourable outcome of coming 3 = 1
Probability = $\frac{favourable outcome }{total outcome}=\frac{1}{6}$
(ii) 7 
Favourable outcome (7) = 1
Probability = $\frac{favourable outcome}{total outcome}=\frac{1}{6}$
(iii) Even number = 2, 4, 6
Favorable outcomes = 3
Probability = $\frac{favourable outcomes}{total outcome}=\frac{3}{6}=\frac{1}{2}$
(iv) Prime Number = 1, 2, 3, 5
Favourable outcomes = 4
Probability = $\frac{favourable outcome}{total outcome}=\frac{4}{6}=\frac{2}{3}$
Regards!