[1 Mark Question Answer]

Question 11 Mark

Find the mode of: <

Height (cm)	37	38	39	40	41
Number of plants	46	89	93	90	153

Answer

Since the frequency of number 41 is maximum
∴ Mode = 41

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Question 21 Mark

Find the mode of:

x	15	16	17	18	19	20	21	22	23
f	6	7	9	13	10	12	8	0	4

Answer

Since the frequency of number 18 is maximum
∴ Mode = 18

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Question 31 Mark

Arrange the following data in descending order:
3.3, 3.2, 3.1, 3.7, 3.6, 4.0, 3.5, 3.9, 3.8, 4.1, 3.5, 3.8, 3.7, 3.9 and 3.4. Determine the range.

Answer

Descending order: 4.1, 4.0, 3.9, 3.9, 3.8, 3.8, 3.7, 3.7, 3.6, 3.5, 3.5, 3.4, 3.3, 3.2, 3.1
Range = 4.1 – 3.1 = 1

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Question 41 Mark

Consider the following numbers: 68, 76, 63, 75, 93, 83, 70, 115, 82, 105, 90, 103, 92, 52, 99, 73, 75, 63, 77 and 71.
What is the range of these numbers?

Answer

Range of given numbers = Largest number – The smallest number = 115 – 52 = 63

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Question 51 Mark

Consider the following numbers:
68, 76, 63, 75, 93, 83, 70, 115, 82, 105, 90, 103, 92, 52, 99, 73, 75, 63, 77 and 71.
Arrange these numbers in ascending order.

Answer

When the above data are written in ascending order. We get,
52, 63, 63, 68, 70, 71, 73, 75, 75, 76, 77, 82, 83, 90, 92, 93, 99, 103, 105, 115

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