Your Progress - Chapter 40% complete
1Exercises7 questions
Q.1What is data handling?v
Answer:
Data handling means collecting data, organising it, representing it in tables or graphs, and interpreting it to answer questions.
Q.2How is a pie chart useful?v
Answer:
A pie chart shows how a whole quantity is divided into parts. Each sector represents a part of the total.
Q.3A die is thrown once. What is the probability of getting an even number?v
Solution
The possible outcomes are $1,2,3,4,5,6$. Even outcomes are $2,4,6$, so probability $=3/6=1/2$.
Answer:
$\dfrac12$.
Q.4A coin is tossed once. What is the probability of getting a head?v
Solution
The equally likely outcomes are head and tail.
Answer:
$\dfrac12$.
Q.5A bag contains 3 red balls and 2 blue balls. What is the probability of drawing a red ball?v
Solution
There are 5 balls in all and 3 favourable red balls.
Answer:
$\dfrac35$.
Q.6What is a histogram?v
Answer:
A histogram is a graph of grouped frequency distribution using adjoining rectangles, where each rectangle represents a class interval.
Q.7Why are bars in a histogram drawn without gaps?v
Answer:
The class intervals are continuous, so the rectangles touch each other to show continuity.