Quantitative Aptitude - Arithmetic Ability Questions

The mean of marks secured by 50 students in division A of class X is 61, 25 students of division B is 57 and that of 50 students of division C is 55. What will be the mean of marks of the students of three divisions of Class X?

If selling price of 39 articles is equal to the cost price of 42 articles, then what will be the profit percentage?

Meghnad can do a piece of work in 45 hours. If he is joined by Jayshri, who is 50% more efficient, in what time will they together finish the work?

Δ PQR is right angled at Q. If m√R = 30°, then what is the value of Cot P?

What is the simplified value of 1-sin A1+sin A ?

Select the odd number from the given alternatives.

A square ground is to be covered by planting 100 saplings on each side. How many saplings are needed in all?

If (X/4) = (Y/5) = (Z/9), then what is X : Y : Z?