Question

If A = {x l x is a prime number less than 30}, find n(A).
A. 9
B. 10
C. 11
D. 12

Answer 1

Answer:

The correct answer is option (B) .

Step-by-step explanation:

The prime numbers less than 30 are 2,3,5,7,11,13,17,19,23,29

Thus $A=\{2,3,5,7,11,13,17,19,23,29\}$

Clearly $n(A)=10$