Question

ɪꜰ ᴩ ᴀɴᴅ ​​q ᴀʀᴇ 2 ꜱᴇᴛꜱ ꜱᴜᴄʜ ᴛʜᴀᴛ ɴ(ᴩ) =12 , ɴ(q-ᴩ) = 7, ᴛʜᴇɴ ɪꜱ ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏꜰ ɴ(ᴩ ᴜ q)​

Answer 1

Given: n(p)=12

n(q-p)=7

we know that: n(q-p)=n(q)

Therefore n(q)=7

Also we know: n(AUB)=n(A) + n(B)

Hence ,n(pUq)=n(p)+n(q)

ie) n(pUq)=12+7

=19