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Practice each question, then open the answer or worked solution.
What is the central angle of the sector (in the above pie chart) representing skin and bones together?
(a) 36o (b) 60o (c) 90o (d) 96o
Solution:-
(d) 96o
Distribution of protein in the skin = 1/10
Distribution of protein in the bones = 1/6
Central angle of the sector representing skin and bones,
= 1/10 + 1/6
= (3 + 5)/30
= 8/30 × 360o
= 96o
What is the central angle of the sector (in the above pie chart) representing hormones enzymes and other proteins?
(a) 120o (b) 144o (c) 156o (d) 176o
Solution:-
(b) 144o
Distribution of protein in the skin = 1/10
Distribution of protein in the bones = 1/6
Distribution of protein in the Muscles = 1/3
Central angle of the sector represents skin, muscles and bones,
= 1/10 + 1/6 + 1/3
= (3 + 5 + 10)/30
= 18/30 × 360o
= 216o
Then,
Central angle of the sector represents hormones enzymes and other proteins,
= 360o – 216o
= 144o
A coin is tossed 12 times and the outcomes are observed as shown below:
The chance of occurrence of Head is
(a) ½ (b) 5/12 (c) 7/12 (d) 5/7
Solution:-
(b) 5/12 … [from the figure]
Total number of outcomes, when a ball is drawn from a bag which contains 3 red, 5 black and 4 blue balls is
(a) 8 (b) 7 (c) 9 (d) 12
Solution:-
(d) 12
A graph showing two sets of data simultaneously is known as
(a) Pictograph (b) Histogram (c) Pie chart (d) Double bar graph
Solution:-
(d) Double bar graph
Size of the class 150 –175 is
(a) 150 (b) 175 (c) 25 (d) –25
Solution:-
(c) 25
The difference between the upper-class limit and lower class limit of a class is called the Size of the class.
= Upper limit – lower limit
= 175 – 150
= 25
In a throw of a dice, the probability of getting the number 7 is
(a) ½ (b) 1/6 (c) 1 (d) 0
Solution:-
(d) 0
Only 1, 2, 3, 4, 5 and 6 are in the dice. So, no chance of getting number 7.
Data represented using circles is known as
(a)Bar graph (b) Histogram (c) Pictograph (d) Pie chart
Solution:-
(d) Pie chart.
Tally marks are used to find
(a) Class intervals (b) Range (c) Frequency (d) Upper limit
Solution:-
(c) Frequency
Upper limit of class interval 75 –85 is
(a) 10 (b) –10 (c) 75 (d) 85
Solution:-
(d) 85