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Answer the following questions by selecting the most appropriate option.
Q. The average of 5 numbers is 140. If one number is excluded, the average of the remaining 4 numbers is 130. The excluded numbers is
- a)135
- b)134
- c)180
- d)350
Correct answer is option 'C'. Can you explain this answer?
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Answer the following questions by selecting the most appropriate optio...
Solution:
Given,
Average of 5 numbers = 140
Average of 4 numbers = 130
Let's assume the excluded number as x.
To find the excluded number, we can use the formula:
Sum of 5 numbers = Average of 5 numbers × 5
Sum of 5 numbers = 140 × 5
Sum of 5 numbers = 700
Now, we can use the formula to find the sum of 4 numbers:
Sum of 4 numbers = Average of 4 numbers × 4
Sum of 4 numbers = 130 × 4
Sum of 4 numbers = 520
To find the excluded number, we can subtract the sum of 4 numbers from the sum of 5 numbers:
Excluded number = Sum of 5 numbers - Sum of 4 numbers
Excluded number = 700 - 520
Excluded number = 180
Therefore, the excluded number is 180, which is option C.
Given,
Average of 5 numbers = 140
Average of 4 numbers = 130
Let's assume the excluded number as x.
To find the excluded number, we can use the formula:
Sum of 5 numbers = Average of 5 numbers × 5
Sum of 5 numbers = 140 × 5
Sum of 5 numbers = 700
Now, we can use the formula to find the sum of 4 numbers:
Sum of 4 numbers = Average of 4 numbers × 4
Sum of 4 numbers = 130 × 4
Sum of 4 numbers = 520
To find the excluded number, we can subtract the sum of 4 numbers from the sum of 5 numbers:
Excluded number = Sum of 5 numbers - Sum of 4 numbers
Excluded number = 700 - 520
Excluded number = 180
Therefore, the excluded number is 180, which is option C.
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Community Answer
Answer the following questions by selecting the most appropriate optio...
Average of 5 numbers = 5*140 = 700. When one number is excluded, Average of 4 numbers = 4*130 =520. So, 700-520=180.
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Answer the following questions by selecting the most appropriate option.Q. The average of 5 numbers is 140. If one number is excluded, the average of the remaining 4 numbers is 130. The excluded numbers isa)135b)134c)180d)350Correct answer is option 'C'. Can you explain this answer?
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