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Home » For the following distribution : Class 0-05 5-10 10-15 15-20 20-25 Frequency 10 15 12 20 9 the sum of lower limits of the median class and modal class is (A)15 (B) 25 (C) 30 (D) 35
For the following distribution : Class 0-05 5-10 10-15 15-20 20-25 Frequency 10 15 12 20 9 the sum of lower limits of the median class and modal class is (A)15 (B) 25 (C) 30 (D) 35
CBSE | Class 10 | Exercise 13.1 | Maths | NCERT Exemplar | Statistics and Probability
For the following distribution : Class 0-05 5-10 10-15 15-20 20-25 Frequency 10 15 12 20 9 the sum of lower limits of the median class and modal class is (A)15 (B) 25 (C) 30 (D) 35

(B) 25

Clarification:

Class      Frequency           Cumulative Frequency

 

0-5         10           10

 

5-10       15           25

 

10-15     12           37

 

15-20     20           57

 

20-25     9             66

From the table, N/2 = 66/2 = 33, which lies in the stretch 10 – 15.

Subsequently, lower breaking point of the middle class is 10.

The most noteworthy recurrence is 20, which lies in the middle of the stretch 15 – 20.

Subsequently, lower cutoff of modular class is 15.

Hence, required total is 10 + 15 = 25.

Subsequently, alternative (B) is right

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