Haryana State Board HBSE 7th Class Maths Solutions Chapter 3 Data Handling Ex 3.4 Textbook Exercise Questions and Answers.

## Haryana Board 7th Class Maths Solutions 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.

Solution:

(i) 0, (ii) between 0 and 1, (iii) 0, (iv) between 0 and 1, (v) between 0 and 1.

Question 2.

There are 6 marbles in a box can with numbers from 1 to 6 marked on each ofthem.

(i) What is the probability of drawing marble with number 2 ?

(ii) What is the probability of drawing marble with number 5 ?

Solution:

Question 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 one head and one tail

∴ P = \(\frac{1}{2}\)

Question 4.

A box contains pairs of socks of two colours (black and white) I have picked out a white sock. I pick out one more with my eyes closed. What is the probability that it will make a pair ?

Solution:

A box contains socks of two colours black and white.

∴ P = \(\frac{1}{2}\)