NCERT Solutions for Class 7 Maths
Chapter 3 Data Handling
Exercise 3.4
1. 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) 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. 3
(iv) The next traffic light seen will be green.
(v) Tomorrow will be a cloudy day.
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
Out of 6 marbles, one can be drawn in 6 ways.
∴ Total number of possible outcomes = 6
(i) Probability of drawing marble with number 2, P (2) = 1/6
(ii) Probability of drawing marble with number 5, P(5) = 1/6 3. A coin is flipped to decide which team starts the game. What is the probability that your team will start?
(ii) Probability of drawing marble with number 5, P(5) = 1/6 3. A coin is flipped to decide which team starts the game. What is the probability that your team will start?
Answer
On tossing a coin, the possible outcome is head (H) or tail (T).
Total number of possible outcomes = 2
and total number of favourable outcomes = l
∴ Required probability = 1/2
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