(1) Number of people with scores between 49.5 and 59.5 =50* 10%=5 people.

Number of people with grades from 89.5 to 100 =50* 10%=5 people.

(2) Number of people with grades of 79.5 to 89.5 =50*30%= 15.

(3) Five people failed (below 60 points), accounting for 10% of the class.