Exams

The mean of marks secured by 55 students in division A of class X is 58, 45 students of division B is 54 and that of 75 students of division C is 52. Find the mean of marks of the students of three divisions of Class X.

What is the value of cos [(180 – θ)/2] cos [(180 – 9θ)/2] + sin [(180 – 3θ)/2] sin [(180 – 13θ)/2]?

If a + b = 11 and a2+ b2= 61, then value of ab is

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
BC, GHI, NOPQ, ?

In the following question, select the odd word from the given alternatives.

Arrange the given words in the sequence in which they occur in the dictionary.
1. Waste
2. Wrong
3. Witty
4. Worcester
5. Warlike

Select the antonym of
to remand

Find the missing number?