Ii The rainfall in mm in a city on 7 days of a certain week was recorded as follows- - Day Mon Tue Wed Thurs Fri Sat Sun- Rainfall-inmm 0-0 12-2 2-1 0-0 20-5 5-5 1-0- - Find the mean rainfall for the week-

Name: NCERT - Grade 07 - Mathematics - Data Handling - Q08_2
Uploaded: 2022-07-04T10:36:42+05:30
Description: Main rainfall=Sum of rainfull recorded/Total number of days =0.0+12.2+2.1+0.0+20.5+5.5+1.0/7 = 5.9 ...

Main rainfall=Sum of rainfull recorded/Total number of days =0.0+12.2+2.1+0.0+20.5+5.5+1.0/7 = 5.9 ...

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Standard VII

Mathematics

Arithmetic Mean and Range

ii The rainfa...

Question

Question 8(ii)
The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:
$\begin{matrix} D a y & M o n & T u e & W e d & T h u r s & F r i & S a t & S u n R a i n f a l l (i n m m) & 0.0 & 12.2 & 2.1 & 0.0 & 20.5 & 5.5 & 1.0 \end{matrix}$
Find the mean rainfall for the week.

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Solution

$M a i n r a i n f a l l = \frac{S u m o f r a i n f u l l r e c o r d e d}{T o t a l n u m b e r o f d a y s} = \frac{0.0 + 12.2 + 2.1 + 0.0 + 20.5 + 5.5 + 1.0}{7}$
= 5.9

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The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:

$\begin{matrix} D a y & Mon & Tue & Wed & Thurs & Fri & Sat & Sun Rainfall & 0.0 & 12.2 & 2.1 & 0.0 & 20.5 & 5.5 & 1.0 (in mm) \end{matrix}$

(i) Find the range of the rainfall in the above data.

(ii) Find the mean rainfall for the week.

(iii) On how many days was the rainfall less than the mean rainfall? [4 MARKS]

Q. The following table shows the maximum temperature of a city on each day of a week. Represent the given data by a line graph: [3 MARKS]

\begin{matrix} Days & M o n . & T u e . & W e d . & T h u r . & F r i . & S a t . & S u n . Max.Temp.(in °C) & 34 & 35 & 37 & 38 & 41 & 39 & 36 \end{matrix}

Q. (1) The maximum daily temperature in a certain city was recorded for a week as given below. Find the average daily temperature for that week.

Mon	Tue	Wed	Thu	Fri	Sat	Sun
37.8	39.7	37.0	43.8	46.1	40.6	42.0

(2) The daily income of a family on five days was Rs 90, Rs 95, Rs 93, Rs 88 and Rs 79. What is the family's average daily income?

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Arithmetic Mean and Range

Standard VII Mathematics

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Question 8(ii) The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows: DayMonTueWedThursFriSatSunRainfall (inmm)0.012.22.10.020.55.51.0 Find the mean rainfall for the week.

Main rainfall=Sum of rainfull recordedTotal number of days=0.0+12.2+2.1+0.0+20.5+5.5+1.07 = 5.9

$M a i n r a i n f a l l = \frac{S u m o f r a i n f u l l r e c o r d e d}{T o t a l n u m b e r o f d a y s} = \frac{0.0 + 12.2 + 2.1 + 0.0 + 20.5 + 5.5 + 1.0}{7}$
= 5.9