The class intervals with the same frequency are

60-65 , 80-85

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70-75 , 75-80

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60-65 , 65-70

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80-85 , 85-90

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Solution

The correct option is C
60-65 , 65-70

Since, the bars for class intervals 60-65 and 65-70 have the same height, they have the same frequency.

option (C) is correct

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Similar questions

Q. Find the median of the following data.

Maths marks	$60 - 65$	$65 - 70$	$70 - 75$	$75 - 80$	$80 - 85$	$85 - 90$	$90 - 95$
No. of students	$8$	$12$	$14$	$8$	$5$	$6$	$4$

Find the cumulative frequency for the class interval 65-70 $\begin{matrix} Class interval & Frequency 50 - 55 & 5 55 - 60 & 20 60 - 65 & 10 65 - 70 & 10 70 - 75 & 9 75 - 80 & 6 80 - 85 & 6 85 - 90 & 8 \end{matrix}$

Find the mean of the following using step deviation method.

Q. The following table given the weekly wages (in Rs.) of workers in a factory:

Weekly wages (in Rs.)	$50 - 55$	$55 - 60$	$60 - 65$	$65 - 70$	$70 - 75$	$75 - 80$	$80 - 85$	$85 - 90$
No. of workers	$5$	$20$	$10$	$10$	$9$	$6$	$12$	$8$

Calculate:
the model class.

Q. The following table given the weekly wages (in Rs.) of workers in a factory:

Weekly wages (in Rs.)	$50 - 55$	$55 - 60$	$60 - 65$	$65 - 70$	$70 - 75$	$75 - 80$	$80 - 85$	$85 - 90$
No. of workers	$5$	$20$	$10$	$10$	$9$	$6$	$12$	$8$

Calculate:
The mean.

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The class intervals with the same frequency are

The correct option is C 60-65 , 65-70 Since, the bars for class intervals 60-65 and 65-70 have the same height, they have the same frequency. option (C) is correct

The correct option is C
60-65 , 65-70

Since, the bars for class intervals 60-65 and 65-70 have the same height, they have the same frequency.

option (C) is correct