Question

A double bar graph is given on marks obtained by 5 students in yearly and half yearly exam in mathematics subject.

Answer the following questions on basis of graph

(i) Whose performance was similar in annual and half yearly examination?

(ii) Whose performance was better in annual as compared to half yearly?

(iii) How many students scored more than 50 in annual examination?

(iv) Which information is given in this double bar graph?

(v) What is the average of marks of half yearly? Is that less than average of annual examination?

Answer 1

(i) Vibha

(ii) Chayan

(iii) 3 students

(iv) The double bar graph gives the marks of 5 students obtained in Mathematics in half-yearly and yearly exam.

(v) Average of marks in half-yearly exam. 

= \(\frac{50+40+60+40+80}{5}\)

= \(\frac{270}{5}\)

= 54

Average of marks in yearly exam.. 

= \(\frac{55+40+85+50+70}{5}\)

= \(\frac{300}{5}\)

= 60

Yes, average marks obtained in half-yearly exam is less than yearly exam.