(xvii) Total number of heart cards is $13$
As We know that, Probability = Number of favorable outcomes/ Total number of outcomes
Therefore, the probability of getting a heart card $=13/52=1/4$
(xviii) Total number of red cards is $26$
We know that, Probability = Number of favorable outcomes/ Total number of outcomes
Therefore, the probability of getting a red card $=26/52=1/2$