Subject
Mathematics
Topic
Statistics
Subtopic
Mean
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Total for 4 values = 4×20=80. Since 5+10+15=30, x=50.…
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This question focuses on the concept of Mean under the broader topic of Statistics.
Related key concepts: Statistics.
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Saba Noor
Mean of 5 numbers is 18. Four numbers are 16, 18, 14, and 22. The 5th number is:
The average of 3 numbers is 26. If the first number is 16 and the second is 31, the third number is:
The arithmetic mean of 2, 4, 6, 8 is:
If all observations are equal, their variance is:
Standard deviation is the square root of:
If the average of 5 students is given and one student leaves, how is the new average calculated?
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Source
QUIZZERA
Reviewed
17 May 2026
Updated
17 May 2026