Question

12.5 , 17.5 , 22.5 , 27.5 , 32.5 are class marks. Find their class intervals​

Answer 1

$Given \: class \: marks (x_{i}):$

$12.5,17.5,22.5,27.5,32.5$

$\blue{ Class \: size (h) } = x_{2} - x_{1}$

$= 17.5 - 12.5$

$= 5$

$i) \pink { Class \: interval \: of \: 12.5 }$

$= \Big( x_{1} - \frac{h}{2} , x_{1} + \frac{h}{2}\Big)$

$= ( 12.5 - 2.5 , 12.5 + 2.5 )$

$= ( 10 , 15 )$

Therefore.,

$\red{ Required \: class \: intervals : }$

$10- 15$

$15 - 20$

$20 - 22$

$25 - 30$

$30 - 35$

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Answer 2

Answer:

Class Intervals

10-15

15-20

20-25

25-30

30-35