" The cardinal number of "A={1,2,3,4,5,6,7,8}" is "

If X={1,3,5,7,9,} then the cardinal number of X is "______" .

The number of four digit odd numbers that can be formed with 1,2,3,4,5,6,7,8,9 is

The probability that number selected at random from that number 1, 2, 3, 4, 5, 6, 7, 8, …., 100 is prime is

Verify that (A nn B)'=A'uu B' ,where A={2,3, 4, 5, 6} , B={3,6,7,8} are subsets of U={1,2,3,4,5,6,7,8}

Let A={1,2,3},\ B={5,6},\ C={4,7,8} . Then AuuBuuC={1,2,3,4,5,6,7,8}

If A = {1,3,5,7} and B = {1,2,3,4,5,6,7,8}, then the number of one-to-one functions from A into B is

If A= {1,3,5,7} and B= {1,2,3,4,5,6,7,8} , then the number of one-to-one functions from A into B is