NCERT Solutions Class 7 Mathematics
Chapter – 3 (Data Handling)
The NCERT Solutions in English Language for Class 7 Mathematics Chapter – 3 Data Handling Exercise 3.4 has been provided here to help the students in solving the questions from this exercise.
Chapter : 3 Data Handling
- NCERT Solution Class 7 Maths Exercise – 3.1
- NCERT Solution Class 7 Maths Exercise – 3.2
- NCERT Solution Class 7 Maths Exercise – 3.3
Exercise – 3.4
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.
Solution –
(i) You are older today than yesterday.
It is certain to happen.
(ii) A tossed coin will land heads up.
It can happen but not certain.
(iii) A die when tossed shall land up with 8 on top.
It is impossible. Because, there are only six faces on a die is marked as 1, 2, 3, 4, 5, and 6 on it.
(iv) The next traffic light seen will be green.
It can happen but not certain.
(v) Tomorrow will be a cloudy day.
It can happen but not certain.
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?
Solution –
(i) What is the probability of drawing a marble with number 2?
Total number of marbles marked with the number from 1 to 6 = 6
∴ n(S) = 6
Number of marble marked with 2=1
∴ n(E) = 1
∴ Required probability = =
(ii) What is the probability of drawing a marble with number 5?
Number of marble marked with 5 = 1
∴ n(E) = 1
∴ Required probability = =
3. A coin is flipped to decide which team starts the game. What is the probability that your team will start?
Solution –
A coin has two faces one is Head (H) and other one is Tail (T).
∴ Sample space S(n) = 2
Number of successful event n(E) = 1
∴ Required probability = = ½
