From the frequency distribution of student marks, tell what is the number of people whose marks is less than 22.5?

$\begin{matrix} C l a s s & 12.5 - 17.5 & 17.5 - 22.5 & 22.5 - 27.5 & 27.5 - 32.5 & 32.5 - 37.5 F r e q u e n c y & 2 & 22 & 19 & 14 & 13 \end{matrix}$

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Solution

The correct option is D
24

2 people have got marks between 12.5 to 17.5.
22 people have got marks between 17.5 and 22.5.
The number of people who have got marks less than 22.5 will include both those students who have got marks between 12.5 and 17.5 and those who have got marks between 17.5 and 22.5.
So, 2 + 22 = 24

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Similar questions

Q. From the frequency distribution of student marks, find the number of students who scored less than 22.5 marks.

\begin{matrix} C l a s s & 12.5 - 17.5 & 17.5 - 22.5 & 22.5 - 27.5 & 27.5 - 32.5 & 32.5 - 37.5 F r e q u e n c y & 2 & 22 & 19 & 14 & 13 \end{matrix}

The frequency distribution table below shows the marks of students. Find the number of people who obtained marks less than 22.5.

$\begin{matrix} C l a s s & 12.5 - 17.5 & 17.5 - 22.5 & 22.5 - 27.5 & 27.5 - 32.5 & 32.5 - 37.5 F r e q u e n c y & 2 & 22 & 19 & 14 & 13 \end{matrix}$

From the frequency distribution of student marks, find the number of students who scored less than 22.5 marks?

$\begin{matrix} C l a s s & 12.5 - 17.5 & 17.5 - 22.5 & 22.5 - 27.5 & 27.5 - 32.5 & 32.5 - 37.5 F r e q u e n c y & 2 & 22 & 19 & 14 & 13 \end{matrix}$

Following frequency distribution gives the weights of the students of a class.

$\begin{matrix} W e i g h t (i n k g) & 31 - 35 & 36 - 40 & 41 - 45 & 46 - 50 & 51 - 55 & 56 - 60 & 61 - 65 & 66 - 70 & 71 - 75 N u m b e r o f s t u d e n t s & 3 & 6 & 13 & 9 & 11 & 7 & 4 & 2 & 1 \end{matrix}$

Find the probability of

(i) choosing a student at random whose weight is atmost 40kg

(ii) choosing a student at random whose weight is greater than 40kg but less than 60kg

(iii) choosing a student at random whose weight is greater than 60kg [3 MARKS]

In the given frequency distribution, marks are ordered. Which 2 observations (students) are the median observations?

$\begin{matrix} M a r k s o b t a i n e d & N u m b e r o f s t u d e n t s (F r e q u e n c y) 20 & 6 25 & 20 28 & 24 29 & 28 33 & 15 38 & 4 42 & 2 43 & 1 \end{matrix}$

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From the frequency distribution of student marks, tell what is the number of people whose marks is less than 22.5? Class12.5−17.517.5−22.522.5−27.527.5−32.532.5−37.5Frequency222191413

From the frequency distribution of student marks, tell what is the number of people whose marks is less than 22.5?

$\begin{matrix} C l a s s & 12.5 - 17.5 & 17.5 - 22.5 & 22.5 - 27.5 & 27.5 - 32.5 & 32.5 - 37.5 F r e q u e n c y & 2 & 22 & 19 & 14 & 13 \end{matrix}$