# Chapter 2 - Set Theory - 2.1 Basic Set Concepts - Exercise Set 2.1 - Page 59: 77

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.

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