In the table given below, what is the percentage of students who secured more than 20 marks? Marks: 1-10 | 11-20 | 21-30 | 31-40 | 41-50 Number of Students: 30 | 40 | 70 | 30 | 30

A student scored 65% marks in an exam. If he scored 78%, 70%, 62% and 65% marks in four subjects out of five subjects, then what is his percentage of marks in the fifth subject?

If mean of 10%, 20%, 30% and 40% of a number is 24, what is that number?

The salary of Anup is 30% more than that of Barun. Find what percentage is the salary of Barun less than that of Anup?

480 students out of 1500 are enrolled in NCC. What percentage of students are not there in NCC?

In an examination, 70% of the students passed in the Paper I, and 60% of the students passed in the Paper II. 15% of the students failed in both the papers while 270 students passed in both the paper…