The cardinal number of the set A = {Letters of the word APPLE} is _________.

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Solution

The correct option is A 4
Given,
A = {Letters of the word APPLE}
$\Rightarrow$ A = {A, P, L, E}

( $∵$ While listing the elements of a set, we do not repeat any element.)

$\Rightarrow n (A) = 4$
$∴$ The cardinal number of the given set $A$ is 4.

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