Question

Weight (in kg) 30-40 40-50 50-60 60-70
70-80
No. of Children
18
24
37
12
9
(1) How many children weigh 60 kg or more than 60 kg?
(a) 12
(b) 9
(c) 20
(d) 21
(ii) The upper limit of the modal class is
(a) 40
(b) 50
(c) 60
(d) 70
(iii) The mean weight (in kg) of the children in the age group of 9 to 16 years is
(a) 50
(b) 52
(c) 55
(d) 56
(iv) How many children belong to the median class?
(a) 37
(b) 12
(c) 9
(d) 24
The class mark of the class 70-80 is
(a) TO
(b) 80
(C) 10
(d) 75​

Answer 1

Answer:

Tees/lion/customer/care/number/8001179408

Step-by-step explanation:

Tees/lion/customer/care/number/8001179408

Answer 2

Answer:

(i) d)21

(ii) c)60

(iii) b)52

(iv) a)37

(v) d)75

Step-by-step explanation:

(i) Children weighting more than 60kg = 12+9 = 21

(ii) Modal class is 50-60. SO upper limit is 60.

(iii) Calculate ∑fixi/∑fi = 5200/100 = 52

(iv) Median class is 50-60. SO 37 children belong to median class.

(v) Class mark = (upper limit + lower limit)/2 = (70+80)/2 = 150/2 = 75