The table below classifies the number of days of a month according to the amount of rainfall received in a certain locality.

Find the mean daily rainfall during this month.

Rainfall

(mm)

Number of days

54

56

58

55

50

47

44

41

3

5

6

3

2

4

5

2

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Solution

We can make the complete table as follows:

Rainfall

(mm)

Number of Days

Total Rainfall (mm)

54

3

162

56

5

280

58

6

348

55

3

165

50

2

100

47

4

188

44

5

220

41

2

82

Total

30

1545

Mean daily rainfall =

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Similar questions

Look at this table. It classifies the days of the months of June, July and August according to the rainfall received in a locality.

Draw a histogram for this data.

Month	June	July	August	September
Rainfall (cm)	5	20	15	10

The table below classifies the members of a committee according to their ages.

Age

Number of Members

25 − 30

30 − 35

35 − 40

40 − 45

45 − 50

50 − 55

55 − 60

Calculate the mean age of the members of this committee.

Find the amount in the following cases.

\begin{matrix} R a i n f a l l (i n c m) & 0 - 10 & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 N u m b e r o f d a y s & 22 & 10 & 8 & 15 & 5 & 6 \end{matrix}

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