The probability of drawing, say, two clubs is:
[tex]\frac{1}{4}\times\frac{12}{51}=0.058824[/tex]
The probabilities of drawing two hearts, two spades or two diamonds is also 0.058824 for each event. The four events are mutually exclusive, therefore the probability of drawing two cards of the same suit is:
[tex]0.058824\times 4=0.2353[/tex]