Question

the cardinal number of the set A=(1,2,1,1,2,1,1)

Answer 1

n(A)=2.since,1and 2 r only distinct numbers in whole set and they r repeated.it doesn't matter how much total no.of elements r there in a given set but to find a cardinal no. of given set u have to just count the no. of distinct elements of set.the no.of distinct elements will be equal to cardinal no. of given set.
hope it will help u and u will understand my answer...

Answer 2

Answer:

Cardinality of Set A is 2