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Introduction
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Arithmetic Progression
Exercise  5.3

1/15, 1/12, 1/10, …, to 11 terms.

5 + (8) + (11) + … + (230)

Given a3 = 15, S10 = 125, find d and a10.

Given d = 5, S9 = 75, find a and a9.

Given, l = 28, S = 144, and there are total 9 terms. Find a.

How many terms of the AP: 9, 17, 25, … must be taken to give a sum of 636.

Show that a1, a2,…, an form an AP where an is defined as below.an = 9  5n. Also, find the sum of the first 15 terms in each case.

If the sum of first n terms of an AP is 4n – n2, what is the first term i.e. S1? What is the sum of the first two terms? What is the second term? Similarly, find the 3rd, then 10th, and nth terms.
Real Numbers
Exercise 1.3
Exercise 1.4
Triangles
Exercise 6.2
Exercise 6.3
Exercise 6.5
History
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History
Geography
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Class IX
MATHS
Mensuration
Compound Interest
Miscellaneous

It is impossible for the census bureau to obtain all the census data about the population of the United States.

Explain your reasoning. The salary of each teacher in a school.

The number of pets for 20 households in a town with 300 households.

Following the election, 18% of the governors of the 50 United States were female.

For a certain movie, 64.3% of the 112 members of the audience were females.

A television show on a particular network won the Emmy for the best comedy

What is the level of measurement for “Time since last visit”?

The jersey number for players on a basketball team is listed below

The top five books on the bestseller list last year

Use a stemandleaf plot to display the data. The data represent the heights of eruptions by a geyser.

The highway fuel consumption (in miles per gallon) for a sample of cars

In the table, include the midpoints, relative frequencies, and cumulative frequencies.

Use the frequency histogram to answer each question.

Use the given frequency distribution to find the Class width, Class midpoints, Class boundaries

Lettuce is planted on a 51acre field. The field is divide into oneacre subplots. A sample is taken from each subplot to estimate the harvest.

Every eighth person entering a cafeteria is asked to choose his or her favorite meal from the list of five different meals that include the description of each.

After an earthquake, a disaster area is divided into 250 equal grids. Thirty of the grids are selected, and every occupied household in the grid is interviewed to help focus relief efforts on what residents require the most.

Questioning students as they leave a university parking lot, a researcher asks 360 students about their eating habits.

In 1985, researchers used random digit dialog to call 1300 people and ask what obstacles kept them from buying insurance.

Use a Piechart to display the data. The data represents the number of countries in a treaty by continent.

A study was conducted to determine how people get jobs. The table lists data from 400 randomly selected jobs.