Question

please do answer example no. 10 in an easier way ​

Answer 1

Answer:

Step-by-step explanation:

Let A = numbers under 20 div by 3 = {3,6,9,12,15,18}

B = no's under 20 div by 4 => {4,8,12,20}

C = no's under 20 div by 5 = > {5,10,15,20}

intersection -> &

then (A&B) = 1, (B&C)=1, (A&C) = 1,(A&B&C) =0