Data Handling(8th Grade > Mathematics ) Questions and Answers
Explanation:-
Answer: Option C. -> May be red or white:
C
The withdrawn ball may be of red colour or white colour. Since white balls are 30 in number, it is more likely that withdrawn ball will be white incolour. Similarly, it is less likely that ball will be red. We can never be sure that withdrawn ball is of red or white unless all the balls are of same colour.
Explanation:-
Answer: Option D. -> 12:
D
Probability=Number of favourable outcomesTotal Number of outcomes
Number of white squares (favourable outcomes) = 32
Total number of squares or outcomes = 64
So probability of coin falling in a white square
=Number of white squaresTotal number of squares
=3264
=12
Explanation:-
Answer: Option A. -> True:
A
A bar graph displays information using bars of uniform width and their heights being proportional to the respective frequencies. Thus, the above statement is true.
Explanation:-
Answer: Option D. -> 72∘:
D
Total expenditure is:
4000 + 2000 + 1500 + 1500 + 1000 = 10,000
Central angle of clothing is
=expenditure on clothingtotal expenditure
=(200010000×360∘)=72∘
Explanation:-
Answer: Option B. -> 1 is true and 2 is false:
B
A bar graph is shown in the figure above. As you can see the height of the rectangle gives us the frequency of the objectthe bar is representing. The width does not represent any quantity. Thus statement 1 is true while statement 2 is false.
Explanation:-
Answer: Option A. -> 12:
A
Total number of Blue Balls= 10-(2+3) =5
Probability of getting Blue Balls
=Number of blue ballsTotal number of balls
=510
=12
Explanation:-
Answer: Option C. -> 15:
C
According to the bar graph, we get to know that a girlwhose age is 10 years has a height of 60 inches, if the age is 15 years then the height is 65 inches and lastly if the age is 20 years then the height is 66 inches. Hencethe height of the 15 year old girl is 65 inches.