Question

Find the prime facturIJU
{r:r is a positive multiple of 3 less than 20} and B = (x : x is an odd prime
number less than 20), then find n(A) + n(B).

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Answer 1

Answer:

A={3,6,9,12,15,18} and B={

Step-by-step explanation:

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