The marks of $20$ students in a test were as follows:
$5, 6, 8, 9, 10, 11, 11, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 18, 19, 20$
The mode is

20

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10

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15

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25

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Solution

The correct option is C $15$
Terms are: $5, 6, 8, 9, 10, 11, 11, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 18, 19, 20$ .
$15$ occurs most number of times $(3$ times $)$ .
Hence, $15$ is the mode of the marks.

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20

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20

5, 6, 8, 9, 10, 11, 11, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 18, 19, 20

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Marks obtained by 5 students in a class test out of 25 are 12, 15, 12, 20 and 17 respectively. Find the mode of the given number of observations.

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