CBSE Class 10-Mathematics: Chapter – 14 Statistics Part 7 (For CBSE, ICSE, IAS, NET, NRA 2023)
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Question 7:
If the values of mean and mode are respectively and , then median
(a)
(b)
(c)
(d)
Answer:
Median Mode
Question 8:
If the mean of the following data is . find the value of P.
Answer:
We have
Now mean
Question 9:
Find the mean of the following data.
Classes | |||||
Frequency |
Answer:
We have
Classes | Mid-value | Frequency | |
Now mean
Hence, mean
Question 10:
The following data gives the information observed life times (in hours) of electrical components. Determine the modal life times of the components.
Life time (in hours) | ||||||
Frequency |
Answer:
Since the maximum frequency and it corresponds to the class
Here,
We know that mode Mo is given by
Thus, modal life hours