The width of each of nine classes in a frequency distribution is $2.5$ and the lower class boundary of the lowest class is $10.6$ . Which one of the following is the upper class boundary of the highest class?

35.6

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33.1

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30.6

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28.1

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Solution

The correct option is B $33.1$
Upper class boundary of the highest class $=$ Lowest class boundary $+ 9 \times$ width of each class.
$\Rightarrow$ Upper class boundary of the highest class $= 10.6 + 9 \times 2.5 = 33.1$

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The width of each of nine classes in a frequency distribution is 2.5 and the lower class boundary of the lowest class is 10.6. Which one of the following is the upper class boundary of the highest class?

The correct option is B 33.1Upper class boundary of the highest class = Lowest class boundary +9× width of each class. ⇒ Upper class boundary of the highest class =10.6+9×2.5=33.1

The width of each of nine classes in a frequency distribution is $2.5$ and the lower class boundary of the lowest class is $10.6$ . Which one of the following is the upper class boundary of the highest class?

The correct option is B $33.1$
Upper class boundary of the highest class $=$ Lowest class boundary $+ 9 \times$ width of each class.
$\Rightarrow$ Upper class boundary of the highest class $= 10.6 + 9 \times 2.5 = 33.1$