can anyone tell me the basics of vectors and simple probability and solve this Q for me ?

In a group of 11 boys , 7 supports United and 4 supports City .

(i) a boy is chosen at random from the group . state , as a fraction , the probability that he supports United .

(ii) on another occasion two of the eleven boys are chosen at random . calculate the probability that they both supports City , giving your answer as a fraction