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Standard X

Mathematics

Experimental Probability

In a year Raj...

Question

In a year Raju gave the examination of maths 11 times and the number of marks obtained are listed below in the form of table in each of his examination

0-10 10-20 20-30 40-50 60-70 20-30

40-50 40-50 0-10 40-50 40-50

He is still left with one examination, what is the experimental probability that he will get marks 40 or more than 40 in next examination of maths?

\frac{3}{11}

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\frac{4}{11}

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\frac{6}{11}

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\frac{5}{11}

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Solution

The correct option is C $\frac{6}{11}$
Total number of times he gave the exam = 11
Number of times he got marks 40 or more than 40 = 6
Experimental probability is defined as, P(E)= $\frac{Number of trails in which event happened}{Total number of trials}$
$∴$ Required probability = $\frac{6}{11}$

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Similar questions

The table below classifies the candidates who took and examination, according to the marks scored by them:

Marks

Number of Candidates

0 − 10

10 − 20

20 − 30

30 − 40

40 − 50

50 − 60

60 − 70

70 − 80

80 − 90

90 − 100

Find the median mark.

Q. The marks obtained by 40 students of a class are given below :

80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90,

50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60

, and

60

Construct a frequency distribution table.

Q. The following distribution shows the marks scored by

140

students in examination. Calculate the mode of the distribution.

Marks	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$
Number of stu.	$20$	$24$	$40$	$36$	$20$

Q. The marks obtained by 40 students of a class are given below :

80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70, 10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80,

90, 50, 80, 60, 70, 40, 50, 60, 90, 60, 40, 40, 60

, and

60

How many students obtained marks below

40

Q. Following are the marks obtained by 30 students in an examination :

15
16
44
27
7
37

20
17
47
25
11
47

8
20
38
28
21
23

9
24
36
30
31
20

10
30
40
19
41
17

Taking class intervals 0-10, 10-20, ..................., 40-50, construct a frequency table.

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The correct option is C 611Total number of times he gave the exam = 11 Number of times he got marks 40 or more than 40 = 6 Experimental probability is defined as, P(E)= Number of trails in which event happenedTotal number of trials ∴ Required probability = 611

The correct option is C $\frac{6}{11}$
Total number of times he gave the exam = 11
Number of times he got marks 40 or more than 40 = 6
Experimental probability is defined as, P(E)= $\frac{Number of trails in which event happened}{Total number of trials}$
$∴$ Required probability = $\frac{6}{11}$