Question

214)-
8-1
11. If X={ x:x is a prime number which is less than 15} Y={y: y is a multiple of 7,7sys30 },
then find i) n(X), ii) n(Y) and iii) n (X-Y)​

Answer 1

Step-by-step explanation:

x = {2,3,5,7,11,13}

Y = {7,14,21,28}

1). n(X) = 6

2). n(Y) = 4

3). X-Y = {2,5,11,13}

n(X-Y) = 4