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- Write average and count.
- Find total = average x count.
- Adjust total if values are added/removed/replaced.
Correct Answer: B
Correct Answer: B
Method / Topic: Average
The answer follows from total divided by number of values.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Average
<table cellspacing="0" style="border-collapse:collapse; width:85px">
<tbody>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px">Original total = 7×18 = 126. Replacing 14 with 28 increases the total by 14, so the new total is 140. New average = 140÷7 = 20.</td>
</tr>
</tbody>
</table>
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Write average and count.
- Find total = average x count.
- Adjust total if values are added/removed/replaced.
The average of 7 numbers is 18. If the number 14 is replaced by 28, what will be the new average?
Explanation
Correct Answer: B
Method / Topic: Average
The answer follows from total divided by number of values.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Average
<table cellspacing="0" style="border-collapse:collapse; width:85px">
<tbody>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px">Original total = 7×18 = 126. Replacing 14 with 28 increases the total by 14, so the new total is 140. New average = 140÷7 = 20.</td>
</tr>
</tbody>
</table>
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