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Question

Arrange the height of 20 students in a grouped distribution table with a class interval of 5. The number of students whose height is below 170cm is ___

Heights (in cm): 150, 153, 162, 170, 186, 153, 162, 180, 165, 150, 178, 156, 184, 176, 173, 186, 159, 183, 180, 156.


A

7

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B

9

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C

10

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D

12

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Solution

The correct option is C

10


HeightNumber of Students15015441551593160164216516911701742175179218018441851892Total20

Number of students whose height is below 170 cm = 4 + 3 + 2 + 1= 10


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