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Question (11)

QN0029503

The monthly rainfall of a city is plotted for a year. Which graph is most suitable to show the trend?

(A) Pie chart
(B) Line graph
(C) Pictograph
(D) Dot plot

Correct Answer: B

Explanation:

Line graphs are best suited for showing changes and trends over time.

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Question (12)

QN0029504

In a line graph, a steeper upward line segment indicates:

(A) No change
(B) Smaller increase
(C) Greater increase
(D) Decrease

Correct Answer: C

Explanation:

A steeper upward slope represents a faster or greater increase.

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Question (13)

QN0029505

The mean of 9 observations is 32. If one observation is removed and the mean becomes 30, then the removed observation is:

(A) 48
(B) 50
(C) 36
(D) 32

Correct Answer: A

Explanation:

Initial sum = 9 × 32 = 288. New sum = 8 × 30 = 240. Removed observation = 288 – 240 = 48.

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Question (14)

QN0029506

A class has 20 students with average marks 72. Two new students score 80 and 84. The new class average:

(A) Must decrease
(B) Must remain the same
(C) Must increase
(D) Cannot be determined

Correct Answer: C

Explanation:

Both new scores are greater than the existing average of 72, so the class average will increase.

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Question (15)

QN0029507

Which statement about median is always true?

(A) It depends on all observations
(B) It is the middle value in ordered data
(C) It is affected equally by extreme values
(D) It is always one of the observations

Correct Answer: B

Explanation:

Median is defined as the middle value (or average of middle values) in ordered data.

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Question (16)

QN0029508

The average temperature in a town was recorded as 28°C. Later it was found that every reading was 2°C more than the actual value. The correct average temperature is:

(A) 26°C
(B) 28°C
(C) 30°C
(D) Cannot be determined

Correct Answer: A

Explanation:

Since every reading is 2°C more than actual, subtract 2 from the average. Correct average = 26°C.

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Question (17)

QN0029509

A data set has median 35. A new value smaller than 35 is added. The median:

(A) Always decreases
(B) Always increases
(C) May decrease or remain unchanged
(D) Always remains unchanged

Correct Answer: C

Explanation:

The effect on the median depends on the number of observations and the position of the new value.

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Question (18)

QN0029510

In a spreadsheet, cell D5 refers to:

(A) Row D and column 5
(B) Column D and row 5
(C) Fifth column and row D
(D) None of these

Correct Answer: B

Explanation:

Spreadsheet cells are named using the column letter followed by the row number.

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Question (19)

QN0029511

The average sleep duration of children decreases from age 6 to age 18 in a line graph. This indicates:

(A) A decreasing trend
(B) An increasing trend
(C) No trend
(D) A fluctuating trend

Correct Answer: A

Explanation:

A downward trend in a line graph indicates that the quantity is decreasing.

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Question (20)

QN0029512

The mean of three numbers is 14. Two of the numbers are 10 and 18. The third number is:

(A) 12
(B) 14
(C) 16
(D) 18

Correct Answer: B

Explanation:

Total sum = 3 × 14 = 42. Third number = 42 – (10 + 18) = 14.

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Question (11)

The monthly rainfall of a city is plotted for a year. Which graph is most suitable to show the trend?

Explanation:

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Question (12)

In a line graph, a steeper upward line segment indicates:

Explanation:

Link:

Question (13)

The mean of 9 observations is 32. If one observation is removed and the mean becomes 30, then the removed observation is:

Explanation:

Link:

Question (14)

A class has 20 students with average marks 72. Two new students score 80 and 84. The new class average:

Explanation:

Link:

Question (15)

Which statement about median is always true?

Explanation:

Link:

Question (16)

The average temperature in a town was recorded as 28°C. Later it was found that every reading was 2°C more than the actual value. The correct average temperature is:

Explanation:

Link:

Question (17)

A data set has median 35. A new value smaller than 35 is added. The median:

Explanation:

Link:

Question (18)

In a spreadsheet, cell D5 refers to:

Explanation:

Link:

Question (19)

The average sleep duration of children decreases from age 6 to age 18 in a line graph. This indicates:

Explanation:

Link:

Question (20)

The mean of three numbers is 14. Two of the numbers are 10 and 18. The third number is:

Explanation:

Link:

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