Answer
n(B) = 5
Work Step by Step
Given B={x|x belongs to N where 2 $\leq$ x <7}
From the given question.
the given set represents the natural numbers which are greater than 2 but less than7
Those numbers are 2,3,4,5,6.
The set contains 5 elements.
The cardinal number for each set is formed by calculating the number of elements in each set.
Therefore the cardinal number for given set B is n(B) = 5.
