MATHEMATICS [5 marks sum]

The following data gives the weights (in grams) of some marbles picked up randomly from 3 boxes. The data was presented in the tabular form as below :

Weight (in g)	No. of marbles
50-55	5
55-60	7
60-65	8
65-70	6
70-75	2
75-80	1
80-85	1

Based on the above information, answer the following questions:
Q.1. Class size of the given distribution is :
(a) 5 (b) 10 (c) 50 (d) 85
Q.2. Class mark of the 3rd class is :
(a) 60 (b) 65 (c) 125 (d) 62.5
Q.3. The number of marbles whose weight is more than or equal to 75 g is :
(a) 0 (b) 1 (c) 2 (d) 28
Q.4. The number of marbles whose weight is less than 70 g is :
(a) 26 (b) 28 (c) 4 (d) 2
Q.5. The class boundaries of the 7th class interval are :
(a) 80, 85 (b) 80.5, 85.5 (c) 79.5, 85.5 (d) 80, 85.5

To maintain the health report card in a hospital, the weights of new born babies are recorded on regular basis. During a week, the weights (in kg) of new borns were recorded as below: 2.7, 2.6, 3.1, 2.2, 2.4, 2.9, 3.0, 2.5, 2.8, 2.5, 2.8, 2.9, 2.2, 2.9, 2.7, 2.8, 2.3, 2.8, 2.1, 2.2

Based on the above information, answer the following questions :
Q.1. Range of the data is:
(a) 1 kg (b) 0.4 kg (c) 0.5 kg (d) 1.1 kg
Q.2. How many babies are born during the week?
(a) 10 (b) 16 (c) 17 (d) 20
Q.3. How many babies weigh less than 2.4 kg ?
(a) 7 (b) 6 (c) 5 (d) 4
Q.4. How many babies weigh more than 2.7 kg ?
(a) 10 (b) 9 (c) 8 (d) 7
Q.5. How many babies weigh 2.8 kg ?
(a) 4 (b) 5 (c) 6 (d) 3

Case Study II : The following data gives the weights (in grams) of some marbles picked up randomly from 3 boxes. The data was presented in the tabular form as below :

Weight (in g)	No. of marbles
50 - 55	5
55 - 60	7
60 - 65	8
65 - 70	6
70 - 75	2
75 - 80	1
80 - 85	1

Based on the above information, answer the following questions :
1. Class size of the given distribution is :
(a) 5 (b) 10 (c) 50 (d) 85
2. Class mark of the 3rd class is :
(a) 60 (b) 65 (c) 125 (d) 62.5
3. The number of marbles whose weight is more than or equal to 75 g is:
(a) 0 (b) 1 (c) 2 (d) 28
4. The number of marbles whose weight is less than 70 g is:
(a) 26 (b) 28 (c) 4 (d) 2
5. The class boundaries of the 7th class interval are :
(a) 80, 85 (b) 80.5, 85.5 (c) 79.5, 85.5 (d) 80, 85.5

Case Study I : To maintain the health report card in a hospital, the weights of new born babies are recorded on regular basis

During a week, the weights (in kg) of new borns were recorded as below :
2.7, 2.6, 3.1, 2.2, 2.4, 2.9, 3.0, 2.5, 2.8, 2.5, 2.8, 2.9, 2.2, 2.9, 2.7, 2.8, 2.3, 2.8, 2.1, 2.2
Based on the above information, answer the following questions :
1. Range of the data is :
(a) 1 kg (b) 0.4 kg (c) 0.5 kg (d) 1.1 kg
2. How many babies are born during the week?
(a) 10 (b) 16 (c) 17 (d) 20
3. How many babies weigh less than 2.4 kg?
(a) 7 (b) 6 (c) 5 (d) 4
4. How many babies weigh more than 2.7 kg?
(a) 10 (b) 9 (c) 8 (d) 7
5. How many babies weigh 2.8 kg?
(a) 4 (b) 5 (c) 6 (d) 3