Question

S={x:x is a positive multiple of 3<20} P={x: xis a prime number <20}. Then n(S-P) *​

Answer 1

Step-by-step explanation:

s={6,9,12,15,18,21,24,27,30,33,3639,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96 ,99}

therefore,

n(s)=32

&

p={2,3,5,7,11,1317,19}

therefore,

n(p)=8

therefore,

n(s)+n(p)=32+8

=40

Answer 2

Answer:

S={x:x is a positive multiple of 3<20} = { 3,6,9,12,15,18}

i.e n(S)= 6

P={x: xis a prime number <20} = { 2,3,5,7,11,13,17}

i.e n (P) = 7

Then,

n(S-P) is not possible it will become negative.

n (P-S) = 7-6 = 1