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1. Let’s do it….

3. The average rainfall per month during June, July and August
150
3
= 50 centimetre
The total rainfall during the entire year of 2014
= 23 X 12 = 276 centimetres
The average rainfall per month during the other 9 months.
276 – 150
9
=14 centimetre

5. The average expenditure from Sunday to Thursday
= 400 rupees
The total expenditure from Sunday to Thursday
= 400 X 5 = 2000
The average expenditure from Sunday to Friday
= 430 rupees
The total expenditure from Sunday to Friday
= 430 X 6 = 2580 rupees
Amount he spent on Friday
=2580 – 2000 = 580 rupees
Including Saturday the average expenditure
=390 rupees
Total expenditure from Sunday to Saturday
= 390 X 7 = 2730
Amount he spent on Saturday
=2730 – 2580 = 150 rupees

7. Number of children in class VI
=40
Average amount donated by class VI
= 50 rupees
Total amount donated by class VI
=2000 rupees
Total amount donated by class V
=800rupees
If we consider both classes together , each donate on
average
2000 + 800
40 + 30
=40 rupees

9. The weight of the new kid in the first group
= 35 kg
The weight of the new kid in the second
group
=36 + 10 X 1
=46 kg
The weight of the new kid in the third group
=34 – 10 X 1
=24 kg