https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:probability-ncert-new/x0419e5b3b578592a:untitled-1179/v/complementary-events 2025-03-01T15:52:37.13987578Z Complementary events This video covers what it means for events to be complementary. We use Venn diagram to build intuition. We also take note of notations used for complementary events. To strengthen the concept, we try finding complementary events for a variety of events observed when we roll a die. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Complementary events This video covers what it means for events to be complementary. We use Venn diagram to build intuition. We also take note of notations used for complementary events. To strengthen the concept, we try finding complementary events for a variety of events observed when we roll a die. https://cdn.kastatic.org/ka-youtube-converted/vQQhebBIJmM.mp4/vQQhebBIJmM.mp4 401 Complementary events and probability https://www.khanacademy.org/math/class-10-tg/x6d741825a19c63c4:probability/x6d741825a19c63c4:complementary-events-and-probability/e/complementary-events-and-probability 2025-12-30T07:05:15.972746521Z Complementary Events and Probability In this exercise, we will learn about complementary events and probability. For any event E, P (E) + P (E' ) = 1, where E' stands for "not E". E and E' are called complementary events. In general, it is true that for an event E, P(E' ) = 1 – P(E). Khan Academy exercise