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NCERT Exemplar · Class 7 · Maths

Chapter 3: Data Handling

Practice each question, then open the answer or worked solution.

Questions

46 questions
Q21Written answer

Mean, Median, Mode are the measures of _________.

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Worked solution

Solution:-

Central tendency

Mean, median and mode are the representative values of a group of observations. They are also called the measures of central tendency of the data.

Q22Written answer

The probability of an event which is certain to happen is _________.

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Worked solution

Solution:-

The probability of an event which is certain to happen is 1.

Q23Written answer

The probability of an event which is impossible to happen is _________.

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Worked solution

Solution:-

The probability of an event which is impossible to happen is 0.

Q24Written answer

When a die is thrown, the probability of getting a number less than 7 is _________.

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Worked solution

Solution:-

When a die is thrown, the probability of getting a number less than 7 is 1.

Let us assume that 1, 2, 3, 4, 5 and 6 are the possible outcomes when the die is thrown.

Probability of getting a number less than 7 = Number less than 7/number of sides in die.

= 6/6

= 1

Q25Written answer

In throwing a die the number of possible outcomes is _________.

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Worked solution

Solution:-

In throwing a die the number of possible outcomes is 6.

Q26Written answer

_________ can be used to compare two collections of data.

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Worked solution

Solution:-

A double bar graph can be used to compare two collections of data.

Q27Written answer

The representation of data with bars of uniform width is called _________.

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Worked solution

Solution:-

The representation of the data in the form of rectangles (bars) of uniform width is called a bar graph.

Q28Written answer

If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is _________.

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Worked solution

Solution:-

If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is 3.

Q29Written answer

The median of any data lies between the _________ and _________ observations.

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Worked solution

Solution:-

The median of any data lies between the minimum and maximum observations.

Q30Written answer

Median is one of the observations in the data if number of observations is _________.

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Worked solution

Solution:-

Median is one of the observations in the data if number of observations is odd.