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Question

The dot plot represents the number of students obtaining different scores in an exam. Each dot represents 5 students.


(i) The score 83 is obtained by 3 students.
(ii) There are 10 unique scores obtained by the students in the class.
(iii) The highest score is obtained by 15 students.
(iv) The score 79 is obtained by 20 students.
Which of the given statements is/are true?

A
(i)
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B
(iii)
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C
Both (ii) and (iv)
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D
Both (i) and (iii)
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Solution

The correct option is C Both (ii) and (iv)

There are 3 dots corresponding to the score 83.
So, the score 83 is obtained by
3×5=15 students.
So (i) is not true.
There are 10 unique scores obtained by the students in the class.
So (ii) is true.
The highest score is 88 corresponding to which are 2 dots. So the number of students scoring the highest is2×5=10 students.
So (iii) is not true.
There are 4 dots corresponding to the score 79.
So, the score 79 is obtained by 4×5=20 students.
So (iv) is true.
Hence, both options (ii) and (iv) are correct.

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