Question

3. Write the Cardinal number of the set given below:
a) A={×: × is an odd prime number,
×<23}.​

Answer 1

Answer:

Correct option is

B

7

The cardinal number

n(A)={x:x is an odd prime number less than 20}

={3,5,7,11,13,17,19}

n(A)=7

Answer 2

Answer:

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