Question

If S=(1,2,3,4,5,6) is a sample space when a die is thrown and A=(1,3,5),B=(2,4,6) are two events of S. Are A and B complementary events justify

Answer 1

Yes ,A and B are complementary events....as the occurrence of one event negates the occurance of another event
A=Ư-B
B=Ư-A