Following table shows the frequency of students who have scored more than 10 marks in Maths. However, there is a score of 40 which is left out. To which class should this score be mapped to?

$\begin{matrix} C l a s s & F r e q u e n c y 10 - 20 & 12 20 - 30 & 2 30 - 40 & x 40 - 50 & y \end{matrix}$

40-50

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30-40

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either a or b

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neither a or b

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Solution

The correct option is A 40-50
As a rule of thumb, if an observation lies at the intersection of classes, it is pushed to the higher class. Here, 40 is pushed to 40-50, not 30-40.

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Similar questions

How many students scored more than or equal to 30 out of 50 marks in a class.
$\begin{matrix} M a r k s & N u m b e r o f s t u d e n t s 0 - 10 & 2 10 - 20 & 12 20 - 30 & 21 30 - 40 & 8 40 - 50 & 5 \end{matrix}$

By using data in example (6), and taking classes 30-40, 40-50... prepare equal to or more than type cumulative frequency table and answer the following questions based on it.

(i) How many students have scored marks 70 or more than 70 ?

(ii) How many students have scored marks 30 or more than 30 ?

There are 68 students of 9th standard from model Highschool, Nandpur. They have scored following marks out of 80, in written exam of mathematics.

70, 50, 60, 66, 45, 46, 38, 30, 40, 47, 56, 68, 80, 79, 39, 43, 57, 61, 51, 32, 42, 43, 75, 43, 36, 37, 61, 71, 32, 40, 45, 32, 36, 42, 43, 55, 56, 62, 66, 72, 73, 78, 36, 46, 47, 52, 68, 78, 80, 49, 59, 69, 65, 35, 46, 56, 57, 60, 36, 37, 45, 42, 70, 37, 45, 66, 56, 47

By taking classes 30-40, 40-50, .... prepare the less than type cumulative frequency table

Using the table, answer the following questions :

(i) How many students, have scored marks less than 80 ?

(ii) How many students have scored marks less than 40 ?

(iii) How many students have scored marks less than 60 ?

Find the median class for the below distribution.
$\begin{matrix} C l a s s & C u m u l a t i v e f r e q u e n c y 10 - 20 & 3 20 - 30 & 17 30 - 40 & 24 40 - 50 & 33 50 - 60 & 51 \end{matrix}$

The following table gives the marks scored by 100 students in an entrance examination.

$\begin{matrix} M a r k s & 0.10 & 10 - 20 & 20 - 30 & 30 - 40 & 40 - 50 & 50 - 60 & 60 - 70 & 70 - 80 N o . o f s t u d e n t s (F r e q u e n c y) & 4 & 10 & 16 & 22 & 20 & 18 & 8 & 2 \end{matrix}$

Represent this data in the form of a histogram

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Following table shows the frequency of students who have scored more than 10 marks in Maths. However, there is a score of 40 which is left out. To which class should this score be mapped to? ClassFrequency10−201220−30230−40x40−50y

The correct option is A 40-50As a rule of thumb, if an observation lies at the intersection of classes, it is pushed to the higher class. Here, 40 is pushed to 40-50, not 30-40.

The correct option is A 40-50
As a rule of thumb, if an observation lies at the intersection of classes, it is pushed to the higher class. Here, 40 is pushed to 40-50, not 30-40.