Electricity used by some families is shown in the following table. Find the mode for use of electricity.
Use of electricity (unit) 0-20 20-40 40-60 60-80 80-100 100-120
No. of families 13 50 70 100 80 17

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Solution

$f o r g i v e n c l a s s m a r k (\frac{60 + 80}{2}) = 70, t h e n o o f f a m i l i e s i s h i g h e s t w h o a r e u s i n g t h i s m u c h e l e c t r i c i t y a n d h e n c e 60 - 80 i s t h e m o d a l c l a s s a n d 70 i s t h e m o d e v a l u e .$

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Q. Electricity used by some families is shown in the following table. Find the mode for use of electricity.

Use of electricity (Unit)	0 - 20	20 - 40	40 - 60	60 - 80	80 - 100	100 - 120
No. of families	13	50	70	100	80	17

Q. Following data represents life period observations of electrical instruments.

Life period (in hrs)	0-20	20-40	40-60	60-80	80-100	100-120
Frequency	100	35	52	61	38	29

Find mode of life period of instruments.

Q. Find the mode of the following distribution :

Class-interval	0 - 20	20 - 40	40 - 60	60 - 80	80 - 100	100 - 120
Frequency	10	35	52	61	38	20

Q. Following table gives frequency distribution of electricity consumption of a household in certain area in a month.

No. of units of electricity	0 - 20	20 - 40	40 - 60	60 - 80	80 - 100
No. of households	4	16	47	65	8

Find modal no. of units of electricity consumed by households in a month.

The following data gives the information on the observed lifetimes (in hours) of $225$ electrical components:

$\begin{matrix} Lifetimes(in hours) & 0 - 20 & 20 - 40 & 40 - 60 & 60 - 80 & 80 - 100 & 100 - 120 No.of components & 10 & 35 & 52 & 61 & 38 & 29 \end{matrix}$

Determine the modal lifetimes of the components.

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Electricity used by some families is shown in the following table. Find the mode for use of electricity.Use of electricity (unit)0-2020-4040-6060-8080-100100-120No. of families1350701008017

forgivenclassmark(60+802)=70,thenooffamiliesishighestwhoareusingthismuchelectricityandhence60−80isthemodalclassand70isthemodevalue.

Electricity used by some families is shown in the following table. Find the mode for use of electricity.
Use of electricity (unit) 0-20 20-40 40-60 60-80 80-100 100-120
No. of families 13 50 70 100 80 17

$f o r g i v e n c l a s s m a r k (\frac{60 + 80}{2}) = 70, t h e n o o f f a m i l i e s i s h i g h e s t w h o a r e u s i n g t h i s m u c h e l e c t r i c i t y a n d h e n c e 60 - 80 i s t h e m o d a l c l a s s a n d 70 i s t h e m o d e v a l u e .$