Exams

Average of the marks of 132 students of a college is 40. If the average of the marks of the passed students is 42 and the average of the marks of the failed students is 20, then what will be the respective ratio of the total marks of passed students and the total marks of failed students?

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

What is the value of 2sec2A?

Which of the following rulers started the Mughal style of painting?

Which of the following compounds is the strongest acid?

Find the value of  x3 - y3, if x - y = 4 and xy = 12.

The lengths of diagonals of a rhombus are 24cm and 10cm the perimeter of the rhombus (in cm ) is :

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