These NCERT Solutions for Class 7 Maths Chapter 3 Data Handling Ex 3.4 Questions and Answers are prepared by our highly skilled subject experts.
NCERT Solutions for Class 7 Maths Chapter 3 Data Handling 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:
The chances are
(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:
Total number of marbles = 6
Total number of possible outcomes = 6
(i) Probability of drawing marble with number 2
p (2) = \(\frac{1}{6}\)
(ii) Probability of drawing marble with number 5
p (5) = \(\frac{1}{6}\)
Question 3.
A coin is flipped to decide which team starts the game. What is the probability that your team will start?
Answer:
Since there are two faces of a coin head (H) and tail (T), when a coin is tossed, then either a ‘H’ or a ‘T’ comes.
successfully achieved outcome = 1
Total number of possible outcomes= 2
[ Head + Tail = 1 + 1 = 2]
Required probability = \(\frac{1}{2}\)