Attempt of the following question:

Subject wise marks obtained by a student in an examination are given below:

Draw pie diagram.

Attempt of the following question:

A die is thrown, then find the probability of the following events :
A is an Event : getting an odd number on the upper surface of the die.

Attempt of the following question:

Below is the given frequency distribution of words in an essay:

Find the mean number of words written.

Attempt of the following question:

Solve the following quadratic equation by using formula method :
5m² + 5m – 1 = 0

Attempt of the following question:

There are three boys and two girls. A committee of two is to be formed.
Find the probability of the following events:
Event A : The committee contains at least one girl.
Event B : The committee contains one boy and one girl.