Why planes don't fly over Tibet? #shorts

Why don't we observe the wave properties of large objects such as a cricket hall or an neroplane ?

In the Awadh school Gomti Nagar,there are 500 students.60% of the students are boys,40% of whom play hockey and the girls don't play of whom play of girls play the girls don't badminton.There are only two games to be played.The number of students who don't play any game is: