Question

A is the set of integers greater than -9 and less than -2

B = {a, i, j, y}
(a) Find the cardinalities of A and B.
n(A) =
n (B) = 4

Answer 1

n(A) = 6

n(B) = 4

Explanation:

The integers greater than -9 but less than -2 are

-8, -7, -6, -5, -4, -3

There are 6 integers and the set A = {-8, -7, -6, -5, -4, -3}

Cardinality of a set is the number of elements in that set

n(A) = 6

n(B) = 4 since there are 4 elements - this seems to have been answered