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- List the given numbers and units.
- Choose the formula that matches the asked value.
- Simplify carefully and compare with options.
Correct Answer: C
Correct Answer: C
Method / Topic: Statistics
The answer follows from the arithmetic relation between the given values.
Short Explanation
Detailed Explanation
Correct Answer: C
Method / Topic: Statistics
Identify the relevant statistical concept (cumulative frequency) and apply its standard definition or transformation rule.
Cumulative frequency up to the third class = 4 + 7 + 9 = 20.
CHECK: Verify the result directly from the observations or the applicable statistical rule.
EXAM TIP: First identify whether the
Do not interchange mean, median and mode, and do not confuse variance with standard deviation.
PRACTICAL EXAMPLE: The same statistical
can be used to summarize marks, measurements, frequencies or other numerical observations.
Therefore, the correct
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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
- List the given numbers and units.
- Choose the formula that matches the asked value.
- Simplify carefully and compare with options.
The frequencies of five successive classes are 4, 7, 9, 6 and 4. What is the cumulative frequency up to the third class?
Explanation
Correct Answer: C
Method / Topic: Statistics
The answer follows from the arithmetic relation between the given values.
Short Explanation
Detailed Explanation
Correct Answer: C
Method / Topic: Statistics
Identify the relevant statistical concept (cumulative frequency) and apply its standard definition or transformation rule.
Cumulative frequency up to the third class = 4 + 7 + 9 = 20.
CHECK: Verify the result directly from the observations or the applicable statistical rule.
EXAM TIP: First identify whether the
Do not interchange mean, median and mode, and do not confuse variance with standard deviation.
PRACTICAL EXAMPLE: The same statistical
can be used to summarize marks, measurements, frequencies or other numerical observations.
Therefore, the correct
See full explanation + shortcut trick
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