The given graph shows a frequency curve. What is the frequency of the class 160-180?

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Solution

The correct option is B
90

The frequency of the class 160-180 is 90.

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Similar questions

Q. Find the missing frequency

f_{1}

and

f_{2}

in table given below; it is being given that the mean of the given frequency distribution is

145

Class	$100 - 120$	$120 - 140$	$140 - 160$	$160 - 180$	$180 - 200$	Total
Frequency	$10$	$f_{1}$	$f_{2}$	$15$	$5$	$80$

Q. The heights of

25

children in centimetre are given below:

174, 168, 110, 142, 156, 119, 110, 101, 190, 102, 190, 111, 172, 140,

136, 174, 128, 124, 136, 147, 168, 192, 101, 129, 114

.
Prepare a frequency distribution table, taking the size of the class interval
as

20

, and answer the following:
(i) Mention the class intervals of highest and lowest frequency.
(ii) What does the frequency

6

corresponding to class interval

(160 - 180)

indicate?
(iii) Find out the class mark (or midpoint) of

(140 - 160)

.
(iv) What is the range of heights?

The following table shows the distribution of the heights of a group of factory workers :

$\begin{matrix} Ht. (cm): & 150 - 155 & 155 - 160 & 160 - 165 & 165 - 170 & 170 - 175 & 175 - 180 & 180 - 185 No. of workers & 6 & 12 & 18 & 20 & 13 & 8 & 6 \end{matrix}$

(i) Determine the cumulative frequencies.

(ii) Draw the 'less than' cumulative frequency curve on graph paper. Use 2 cm = 5 cm height on one axis and 2 cm = 10workers on the other.

Q. Find the missing frequency of the mean of the data is

154

Classes	$120 - 130$	$130 - 140$	$140 - 150$	$150 - 160$	$160 - 170$	$170 - 180$
Frequency	$2$	$8$	$12$	$f$	$8$	$7$

Q. If the mean of the given frequency distribution is 160, then the value of f is equal to

\begin{matrix} Classes & Frequency 100 - 120 & 10 120 - 140 & 15 140 - 160 & 20 160 - 180 & f 180 - 200 & 15 200 - 220 & 12 \end{matrix}

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The given graph shows a frequency curve. What is the frequency of the class 160-180?

The correct option is B 90 The frequency of the class 160-180 is 90.

The correct option is B
90

The frequency of the class 160-180 is 90.