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Question

The class interval value of class 30-y is 19. Find the value of 'y'.


  1. 11

  2. 15

  3. 39

  4. 45


Solution

The correct option is C

39


Given, class interval value is 19.

For the class 30-y, the lower limit is 30 and the upper limit is y.

The class interval = upper limit  lower limit
19 = y30
y = 49
y=49

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