The mean and standard deviation of maks obtained by 50 students of a class in three subjects Mathematics , Physics and Chemistry are given below:

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

The mean and standard deviation of marks obtained by 40 students of a class in three subjects Mathematics, Science and Social Science are given below. Which of the three subjects shows highest variation and which shows lowest variation in 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: {:("Subject","Mathematics","Physics","Chemistry"),("Mean",42,32,40.9),("Standard deviation",12,15,20):} Which of the three subjects shows the highest variability in marks and which shows the lowest?

Marks of the students in a particular subject of a class are given below. Find its standard deviation.

A student obtain 75%, 80% and 85% in three subjects if the marks of another subject are added. Then the average cannot be less than

A class has 175 students. The following data shows the number of students opting one or more subjects. Mathematics 100, Physics 70, Chemistry 40, Mathematics and Physics 30, Mathematics and Chemistry 28, Physics and Chemistry 23, Mathematics, Physics and Chemistry 18. How many students have offered Mathematics alone?

The probabilities that a student passes in Mathematics,Physics and Chemistry are m, p and c, respectively. Of these subjects, the student has a 75% chance of passing in at least one, a 50% chance of passing in at least two and a 40% chance of passing in exactly two. Which of the following relations are true?

Following are the marks obtained by 9 student in a mathematics test 50,69,20,33,53,39,40,65,59, The mean deviation from the median is

Figure below shows tracks of three charged particles in a uniform clectrostatic field. Give the signs of the three charges. Which partiele has the highest charge to mass ratio?

The mean and standard deviation of a group of 100 observations were found to be 20 and 3, respectively. Later on it was found that three observations were incorrect, which were recorded as 21, 21 and 18. Find the mean and standard deviation if the incorrect observations are omitted.