Question

Cards bearng numbers 2, 3, 4,..., 11 are kept in a bag. A card is drawn at random from the bag. The probability of getting a card with a prime number is
(a) $\frac{1}{2}$ (b) $\frac{2}{5}$ (c) $\frac{3}{10}$ (d) $\frac{8}{89}$

Answer 1

Total cards: 2 to 11 ie 10 cards

$\text{Probability (Event)}=\frac{\text{Number of favourable outcomes}}{\text{Total outcomes}}$

Prime nos. 2,3,5,7,11

Proabaility $=\frac{5}{10}=\frac{1}{2}$

answer:- (a) $\frac{1}{2}$