There are 100 cards numbered from 1 to 100 in a box. If a card is drawn from the box and the probability of an event is 1/2, then the number of favourable cases to the event is ________.
A. 20
B. 25
C. 40
D. 50
A. 20
B. 25
C. 40
D. 50
Correct Answer – D