We can use the random sampling technique if and only if all the students of the school are equally brilliant in the game of cricket, otherwise, if no such information is available non-random sampling technique can be used. In this regard, any of the non-random sampling, namely, judgement, quota or convenience sampling technique can be used. For instance, in accordance to the judgement sampling, based on your own opinion and judgement, any 11 students that in your opinion are the best, can be selected out of the total 40 students.