Shivani obtained 55, 60, 47, 65 and 73 out of 75 in different subjects of a semester. Find her average marks.

What is the average of the first five odd multiples of 11?

A committee of 4 is to be formed out of 6 men and 4 women. What is the number of ways in which this can be done so as to include at least 2 women?

The value of (log₅(25)) (log₄(27)) (log₃(16)) (log₂(4)) is:

Amit went shopping and he has to pick two red shirts from 6 red and 4 white shirts. What is the probability of getting red shirts if he picks randomly?

The marks obtained by top 5 students in a class is given below: 

5, 7, 8, 9, 10 

Find the variance of the marks obtained. 

If the average of a, b, and 26 is 18, then what is the average of a and b? 

What is the greatest number which on dividing 140 and 100 leaves remainder 2 and 8 respectively? 

What is the least number which when trippled will be exactly divisible by 6, 9, 10 and 21?

What is the number of digits in $3^{3^5}$? Given that log 3 = 0.47712.