Math, asked by kanni9742, 4 days ago

if the marks distribution of a number of candidatesin an examination, out of 100,are in accordance with the table below, what is the estimate number ofcandidates who scored between 58 and 72?marks m<55 candidates 41055<m <=60 candidates 40 60<= m<=65 candidates 5065<=m<=70 candidates 40 70<=m<=75 candidates 30​

Answers

Answered by ramnerashchauchan
0

Answer:

Step-by-step explanation:

Let the mean be  x

Using the direct method: x=∑ni​∑xi​ni​​

                                               =302×17.5+3×32.5+7×47.5+6×62.5+6×77.5+6×92.5​

                                               =301860​=62

Mode is the data point that occurs the most frequently in the data set. 

Hence, the mode is class-interval 40−55.

Answered by varindagarg812
0

Answer:

Concept:

In statistics, a frequency distribution is a list, table, or graph This graph depicts the frequency of various outcomes in a sample. Each table row contains the frequency or count of occurrences of values within a given group or interval.

Given:

Out of 100, mark distribution of a group of candidates in an examination.

Find:

a rough estimate of the number of candidates who received a score between 58 and 72

Solution:

Marks               frequency    cf Less than

Less than 55         40                  40

55  -   60               40                  80

60  -   65               50                  130

65  -   70               40                   170

70  -   75               30                   200

From the give graph

Less than 58 marks  = 64

Candidates whos cored between 58 and 72  = 184 - 64 = 120

A total of 120 candidates received a score between 58 and 72.

The answer is 120

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