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Let A = {x : x is a multiple of 3} and B...

Let A = {x : x is a multiple of 3} and B = {x : x is a multiple of 5}, then `A nn B` is given by

A

{3, 6, 9}

B

{5, 10, 15, 20, …}

C

{15, 30, 45, …}

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
A = {x : x is a multiple of 3}
A = {x : x = 3m, `m in N`}
B = {x : x is a multiple of 5}
B = {x : x = 5n, `n in N`}
`A nn B` = {x : x is a multiple of both 3 and 5} = {15, 30, 45, …}
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