Question

Observe the given table and find –

Subjects	English	Hindi	Maths	Science	Social Science
Marks	$67$	$76$	$88$	$85$	$78$

I. What are the total marks?
II. Find the average marks.
III. In which subject the student has scored the highest marks?
IV. In which subject the student has scored lowest marks?
V. What is the range of the marks obtained?

Answer 1

Hint: Average is the ratio of sum of total observations with the number of observations. The highest score is the maximum marks scored and the lowest score is the minimum marks scored. Read the given instructions and follow as per the required solutions.

Complete step-by-step answer:
The total marks in the given table are the sum of marks of all the subjects.
The total marks $ = 67 + 76 + 88 + 85 + 78$
Simplify the above expression finding the sum of the terms –
The total marks $ = 394$
The average of marks can be calculated by taking the ratio of sum of total marks upon the total number of the subjects.
Average $ = \dfrac{{67 + 76 + 88 + 85 + 78}}{5}$
Find the sum of the terms in the above expression –
Average $ = \dfrac{{394}}{5}$
Divide the above expression –
Average $ = 78.8$
The highest score of the student is $ = 88$
The lowest score of the student is $ = 67$
The range of the marks can be given by using the lowest and the highest scored marks.
Range $ = 67 - 88$

Note: Average is also known as the mean. Know the difference among the terms mean, median and the mode. Median is the middle most value of the series. Be careful between the terms highest and the lowest.