https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:probability-ncert-new/x0419e5b3b578592a:algebra-of-events/v/algebra-of-events 2025-03-01T15:52:37.13987578Z Algebra of events Let's talk about adding and subtracting events. Lets leverage our knowledge from the chapter Sets to find intersection and union of events! Specifically, we find A or B, A and B, and A but not B - for two given sets A and B. We then practice what we've learnt by solving some more problems. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Algebra of events Let's talk about adding and subtracting events. Lets leverage our knowledge from the chapter Sets to find intersection and union of events! Specifically, we find A or B, A and B, and A but not B - for two given sets A and B. We then practice what we've learnt by solving some more problems. https://cdn.kastatic.org/ka-youtube-converted/glHiLlPuezg.mp4/glHiLlPuezg.mp4 436 Describing sample spaces and events https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:probability-ncert-new/x0419e5b3b578592a:algebra-of-events/v/worked-example-algebra-of-events 2025-03-01T15:52:37.13987578Z Worked example - Algebra of events Let's solve a challenging problem to hone of skills on Algebra of Events. We're given three events that one can get when we roll two dice. We're asked to describe a bunch of events that require us to find complements, perform algebra of events, and a combination of both. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Worked example - Algebra of events Let's solve a challenging problem to hone of skills on Algebra of Events. We're given three events that one can get when we roll two dice. We're asked to describe a bunch of events that require us to find complements, perform algebra of events, and a combination of both. https://cdn.kastatic.org/ka-youtube-converted/xR7FAK2z6lQ.mp4/xR7FAK2z6lQ.mp4 761 Describing sample spaces and events https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-probability-statistics/cc-7th-compound-events/v/compound-sample-spaces 2020-09-16T18:09:53Z Sample spaces for compound events Explore the notion of a "sample space". See a sample space represented as a tree diagram, table, and list. video https://cdn.kastatic.org/googleusercontent/BX_MVovz6cpjVuvUsT9e0uYBSxiyXvIMRkxktTHZ1t_puhtr3EgkFHEGnpLCImJZwtZUdJpHVdHMXvys7Jb4HCT4 Sample spaces for compound events Explore the notion of a "sample space". See a sample space represented as a tree diagram, table, and list. https://cdn.kastatic.org/ka-youtube-converted/PR-A3UAO7_0.mp4/PR-A3UAO7_0.mp4 550 Describing sample spaces and events 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 Describing sample spaces and events https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-probability-statistics/cc-7th-compound-events/e/sample-spaces-for-compound-events 2024-07-02T15:13:57.224761668Z Sample spaces for compound events Practice checking if sample space diagrams match a compound event. Justin Helps exercise 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