Subject:
CBSE BOARD XIIAuthor:
red84Created:
1 year agoGiven : The average of 7 numbers is calculated to be 35. Each number is increased by 8,
To find : The mean of new numbers.
Solution :
We can simply solve this mathematical problem by using the following mathematical process. (our goal is to calculate the mean of new numbers)
Mean (or, average) of initial 7 numbers = 35
So,
Sum of initial 7 numbers :
= Mean of initial 7 numbers × 7
= 35 × 7
= 245
Now, each of the 7 numbers is increased by 8
So,
For 1 number the increase amount is = 8
For 7 numbers the increase amount is = 8 × 7 = 56
Total increase amount = 56
Sum of 7 new numbers :
= Sum of initial 7 numbers + Total increase amount
= 245 + 56
= 301
So, mean of 7 new numbers :
= Sum of 7 new numbers ÷ 7
= 301 ÷ 7
= 43
(This will be considered as the final result.)
Used formula :
Mean of n terms = Sum of n terms ÷ n
Sum of n terms = Mean of n terms × n
Hence, the mean of new numbers is 43
Author:
olliejdcl
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