Find the average of the first 9 counting numbers (1, 2, 3, 4, 5, 6, 7, 8, 9).
3. The number of students in 6 sections of Class 5 in Vidya School are 43, 46, 40, 43,
44, 42. Find the average number of students per class.
4. The average daily expense of the Vaidya family is 1454.
How much do they spend in
a week?
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Answer:
The average of the first 9 counting numbers is 5.
The average number of students per class is 43.
They spend 10,178 in a week
Given : first 9 counting numbers (1, 2, 3, 4, 5, 6, 7, 8, 9).
The number of students in 6 sections of Class 5 in Vidya School are 43, 46, 40, 43, 44, 42.
The average daily expense of the Vaidya family is 1454.
To Find : average of the first 9 counting numbers
the average number of students per class.
How much do they spend in a week?
Solution:
first 9 counting numbers (1, 2, 3, 4, 5, 6, 7, 8, 9).
Average = Sum of 9 numbers / 9
= (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)/9
= 45/9
= 5
Hence the average of the first 9 counting numbers is 5
The number of students in 6 sections of Class 5 in Vidya School are
43, 46, 40, 43, 44, 42.
Total Students = 43 + 46 + 40 + 43 + 44 + 42 = 258
Total sections = 6
average number of students per section = 258/6 = 43
he average daily expense of the Vaidya family is 1454.
There are 7 days in a week
Hence Spend in a week = 7 * average Daily spend
= 7 * 1454
= 10178
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