Question

The distance at which some children live from their school is given in kilometers.

1, 3, 2, 4, 5, 4, 1, 3, 4, 5, 6, 4, 6, 4, 6.

make a frequency table of this data.​

Answer 1

Step-by-step explanation:

Organise the following marks in a class assessment, in a tabular form.

4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7

(i) Which number is the highest?

(ii) Which number is the lowest?

(iii) What is the range of the data?

(iv) Find the arithmetic mean.

ANSWER:

Marks

Tally marks

Frequency

1

1

2

2

3

1

4

3

5

5

6

4

7

2

8

1

9

1

(i) Highest number = 9

(ii) Lowest number = 1

(iii) Range = (9 − 1) = 8

(iv) Sum of all the observations = 4 + 6 + 7 + 5 + 3 + 5 + 4 + 5 + 2 + 6 + 2

+ 5 + 1 + 9 + 6 + 5 + 8 + 4 + 6 + 7

= 100

Total number of observations = 20

=

Answer 2

Answer:

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.

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