Marks obtained in mathematics examination are given below:(ii)Find variance of the marks.

Marks obtained in mathematics examination are given below:(i)Mean of the marks……..

Marks obtained in mathematics examination are given below:(iii)Find standard deviation of marks

The mean and standard deviation of marks obtained by 50 students in a class in two subjects , mathematics and accountancy are given below : Which of the subject shows the highest variability in marks? and why?

The marks obtained by a student of class XI in first and second terminal examination are 62 and 48, respectively. Find the minimum marks he should get in the annual examination to have an average of at least 60 marks.

Raju obtained 70 and 60 marks in first two examinations. Find the minimum mark he should get in the third examination to have an average of atleast 50 marks.

The mean and standard deviation of marks obtained by 50 students of a class in three subjects , mathematics ,Physics and Chemistry are given below : Which of the three subject shows the highest variability in marks and which shows the lowest?

Consider the following data in respect of marks of 50 students in mathematics and physics. Find coefficient of variation of mathematics and physics.

The probability disribution of a random variable X is given below Find the mean and variance of the variable

Arathi took 3 examinations in an year. The marks obtained by her in the second and third examinations are more than 5 and 10 respectively than in the first examination. If her average mark is at least 80 find the minimum mark that she should get in the first examination?

The mean and S.D. of marks obtained by 50 students of a class in three subjects mathematics , physics and chemistry are given below? which of the three subjects the highest variability in marks and which shows the lowest?