CASE STUDY QUESTION 46-Class X-Maths

CASE STUDY QUESTION 46-Class X-Maths

In a school, Class X B and C students appeared for Sunday Sample paper test 05 and marks obtained out of 80 are formulated in a table as follows:

(a) How many students secured less than 40 marks?
(i) 50 (ii) 40 (iii) 60 (iv) 30
Ans: (i) 50

(b) What is the upper limit of modal class?
(i) 20 (ii) 30 (iii) 40 (iv) 50
Ans: (iii) 40

(c) The median class is :
(i) 10-20 (ii) 20-30
(iii) 30-40 (iv) 40-50
Ans: (iii) 30-40

(d) The mean marks of the students is :
(i) 35.8 (ii) 35.9
(iii) 36 (iv) 36.5
Ans: (ii) 35.9

Mean = 2870/80 = 35.9 (approx.)

(e) Class mark of the class preceding the modal class is :
(i) 35 (ii) 30 (iii) 25 (iv) 45
Ans: (iii) 25