Following table shows the birh month of 40 students of class IX.

$\begin{matrix} J a n . & F e b . & M a r c h & A p r i l & M a y & J u n e & J u l y & A u g . & S e p t . & O c t . & N o v . & D e c . 3 & 4 & 2 & 2 & 5 & 1 & 2 & 6 & 3 & 4 & 4 & 4 \end{matrix}$

Find the probability that a student was born in August.

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Solution

Total number of student of students $(n) = 40$

$\begin{matrix} J a n . & F e b . & M a r c h & A p r i l & M a y & J u n e & J u l y & A u g . & S e p t . & O c t . & N o v . & D e c . 3 & 4 & 2 & 2 & 5 & 1 & 2 & 6 & 3 & 4 & 4 & 4 \end{matrix}$

$∴$ Probability P(A) = $\frac{No. of students born in August}{Total number of students} = \frac{6}{40} = \frac{3}{20}$

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Similar questions

Q. Following table shows the birth month of 40 students of class IX.

Jan.	Feb	March	April	May	June	July	Aug.	Sept.	Oct.	Nov.	Dec.
3	4	2	2	5	1	2	5	3	4	4	4

Find the probability that a student was born in August.

Q. The table given below shows the month of birth of 36 students of a class.

Month of birth	Jan	Feb	Mar	Apr	May	June	July	Aug	Sept	Oct	Nov	Dec
No. of students	4	3	5	0	1	6	1	3	4	3	4	2

A student is chosen at random from the class. What is the probability that the chosen student was born in October?
(a)

\frac{1}{3}

(b)

\frac{2}{3}

(c)

\frac{1}{4}

(d)

\frac{1}{12}

Question 3
In a particular section of Class IX, 40 students were asked about the months of their birth and the following graph was prepared for the data so obtained:

Find the probability that a student of the class was born in August.

Q. In a particular section of class IX, 40 students were asked about the month of their birth and following graph was prepared for data so obtained:
Find the probability that a student of the class was born in August.

Question 3
In a particular section of Class IX, 40 students were asked about the months of their birth and the following graph was prepared for the data so obtained:

Find the probability that a student of the class was born in August.

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Following table shows the birh month of 40 students of class IX. Jan.Feb.MarchAprilMayJuneJulyAug.Sept.Oct.Nov.Dec.342251263444 Find the probability that a student was born in August.

Total number of student of students (n)=40 Jan.Feb.MarchAprilMayJuneJulyAug.Sept.Oct.Nov.Dec.342251263444 ∴ Probability P(A) =No. of students born in AugustTotal number of students=640=320