Question

From a deck of cards, a card is picked at random. The probability that picked card is a red card is .(In decimals)

Answer 1

Number of cards in a deck $=52$
Number of red cards $=26$

Probability of getting red card is $\text{P(R)}=\frac{\text{Number of favourable outcome}}{\text{Total number of outcome}}$
$\text{P(R)}=\frac{26}{52}=\frac{1}{2}=\mathrm{0.5.}$