Question

For each set, given below, state whether it is finite set, infinite set or the null set:

ix. C = {$x:x$ is a prime number between 7 and 10}

Answer 1

Step: Check whether the given set is finite, infinite or null set

Given set: C = {$x:x$ is a prime number between 7 and 10}

There is no prime number between 7 and 10.

$\therefore$ No element is present in set C.

And we know that the set with no element in it, is called an empty set or null set.

Hence, set C is a null set.