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

Marks obtained in mathematics examination are given below:(ii)Find variance 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 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?

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.

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?

Mark the main chain in the compounds givenbelow.

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 three subjects shows the highest variability, in marks and which shows the lowest?

To receive grade 'A' in a course, one must obtain an average of 90 marks or more in five examination (each of 100 marks). If sunita's marks in the first four examination are 87,92,94 and 95 find the minimum marks that sunita must obtain in the fifth examination to get grade 'A' in the course.