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In a class of $30$ students, $A$ is ranked eighth from the top. $B$ is five ranks below $A$.

$B’s$ rank from the bottom is _____.
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total 30 students .

A is in 8th position from top , B is in 5 ranks below A , B's position is ( 8 + 5) = 13 th position .

B’s rank from bottom is ( 30 - 13 + 1 ) = 17 + 1 = 18th position 

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2

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8   A 

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13  B 

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30

The number of positions between 30 to 13 inclusive 13 is 18 .

Answer:

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