Find here step-by-step NCERT Maths Solution Class 7 Exercise 3.4 Chance & Probability | Chapter 3 Data Handling from CBSE NCERT textbook.

Before moving to maths solution class 7 exercise 3.4 , it is advised to go through the following topics:

• Data Handling

## NCERT Maths Solution Class 7 Exercise 3.4 | Data Handling

Problems in Exercise 3.4 require the knowledge of Chance and Probability.

Events that have many possibilities can have probability between 0 and 1.

Those events which have no chance of happening have probability 0 and those that are bound to happen have probability 1.

### Exercise 3.4

Chance & Probability

**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.

• Age certainly increases day by day.

• Tossed coin can land head up or tail up.

• A die has only six faces marked from 1 to 6.

• A traffic light signals through 3 clours consecutively each for fixed amount of time.

• Nature of clouds on a certain day depend on the weather of an area.

[ NCERT MATHS SOLUTION CLASS 7 EXERCISE 3.4 ]

**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**

Chances of drawing each marble are equal.

Total number of possible outcomes = 6

(i) The probability of drawing a marble with number 2,

P =

(ii) The probability of drawing a marble with number 5,

P =

[ NCERT MATHS SOLUTIONS CLASS 7 EXERCISE 3.4 ]

**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 possible outcomes Head and Tail.

Chances of getting Head or Tail are equal,

P (head or tail) =

Therefore, whatever side of coin the team choose, the probability to start is .