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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

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

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.

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

60

140

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

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

60

40

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