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

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

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Solution

The correct option is D
24

There are 2 people who got marks between 12.5 to 17.5. 22 people who got the marks between 17.5 and 22.5. The number of people who 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. This is nothing but 2 + 22 = 24

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Similar questions

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

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

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

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

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}

Q. Convert the following data in a simple frequency distribution:

5 students obtained less than 3 marks

12 students obtained less than 6 marks

25 students obtained less than 9 marks

33 students obtained less than 12 marks

Using the data in example (3) above, prepare less than type cumulative frequency table and answer the following questions.

(i) How many students obtained less than 40 marks ?

(ii) How many students obtained less than 10 marks ?

(iii) How many students obtained less than 60 marks ?

(iv) Find the cumulative frequency of the class 50-60.

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The frequency distribution table below shows the marks of students. Find the number of people who obtained marks less than 22.5. Class12.5−17.517.5−22.522.5−27.527.5−32.532.5−37.5Frequency222191413

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

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