average of n numbers is 58. if each of 65% number is increased by 9 and each of remaining is decreased by 11. find the New average
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Answer:
65%
=13/20. overall change = 40 40/20= 2. 58+2= 60
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Question :
Average of n numbers is 58. if each of 65% number is increased by 9 and each of remaining is decreased by 11. Find the new average.
Answer :
New average is 60.
Given :
Average of n numbers = 58
65% number is increased by 9
Each of remaining is decreased by 11.
To find :
The new average
Solution :
Let the total number be 100
Average is 58
Total = 100 × 58 = 5800
65% of 100 = 65
Total increase in 65 numbers = 65 × 9
= 585
Total decrease in the rest (100-65) = 35 numbers
= 35 × 11
= 385
Total increase in 100 numbers = 585 - 385
= 200
Now, total = 5800 + 200 = 6000
Hence, new average = 6000/100
= 60
New average is 60.
#SPJ3
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