NCERT Solutions for Class 7 maths chapter 3
Data Handlings
NCERT Solutions for Class 7 maths chapter 3 Exercise 3.4
Question 1
Tell whether the following is certain to happen, impossible, can happen but not certain.
(i) You are older today than yesterday.
(ii) A tossed coin will land heads up.
(iii) A die when tossed shall land up with 8 on top
(iv) The next traffic light seen will be green.
(v) Tomorrow will be a cloudy day.
Answer
(i)It is certain to happen.
(ii)It can happen but not certain.
(iii)It is impossible.
(iv)It can happen but not certain.
(v)It can happen but not certain.
Question 2
There are 6 marbles in a box with numbers from 1 to 6 marked on each of them.
(i) What is the probability of drawing a marble with number 2?
(ii) What is the probability of drawing a marble with number 5?
Answer
(i)There are total 6 marbles marked from 1 to 6 in the box
Probability of drawing a marble with number 2 =
1
/
6
(ii)
There are total 6 marbles marked from 1 to 6 in the box.
Probability of drawing a marble with number 5 =
1
/
6
Question 3
A coin is flipped to decide which team starts the game. What is the probability that your team will start?
Answer
A coin has two faces one is Head and other one is Tail.
Now, one team can choose either Head or Tail.
Probability of starting game=
1
/
2