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23 Apr 2021, 02:45
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
74% (01:47) correct
26%
(02:07)
wrong
based on 53
sessions
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If the average of the numbers 25.5, 34.3, 30.8, 28.7, 27.6 and x is 26.5, what is the value of x?
(A) 25.5
(B) 17.6
(C) 13.2
(D) 12.1
(E) 12
(A) 25.5
(B) 17.6
(C) 13.2
(D) 12.1
(E) 12
23 Apr 2021, 03:47
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26.5 * 6 = 159 is the total sum of the set
Given that set consists of numbers with decimals and that the answer choices have differing decimal values, one can focus solely on them.
Adding up the given decimal values from the set: 0.5+0.3+0.8+0.7+0.6 = 2.9
As we know the total sum of the set has no decimals, x must be a value with the decimal .1
Answer D 12.1
Posted from my mobile device
Given that set consists of numbers with decimals and that the answer choices have differing decimal values, one can focus solely on them.
Adding up the given decimal values from the set: 0.5+0.3+0.8+0.7+0.6 = 2.9
As we know the total sum of the set has no decimals, x must be a value with the decimal .1
Answer D 12.1
Posted from my mobile device
23 Apr 2021, 04:09
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Solution
Given
To find
Approach and Working out:
Hence, option D is the correct answer.
Correct Answer: Option D
Given
- • Numbers: 25.5, 34.3, 30.8, 28.7, 27.6 and x
- o Average of the above numbers = 26.5
To find
- • The value of x
Approach and Working out:
- • Average of 25.5, 34.3, 30.8, 28.7, 27.6 and x = 26.5
- o Total numbers = 6
• 25.5 + 34.3 +30.8+ 28.7 + 27.6 +x = 6 × 26.5
• 25.5 + 34.3 +30.8+ 28.7 + 27.6 +x = 159
• 146 .9 + x = 159
• x = 12.1
Hence, option D is the correct answer.
Correct Answer: Option D
