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CHAPTER AT A GLANCE
Probability
•Unit: Statistics and Probability
•Board weightage: Statistics and Probability together carry about 11 marks out of 80; this chapter usually gives short questions of 1 or 2 marks, and one 3-mark question, and sometimes a case-study question (please check the latest sample paper)
•This textbook edition covers: the theoretical (classical) probability with equally likely outcomes, complementary events, and examples with coins, dice, cards and bags. Problems on geometrical probability (marked with a star in the textbook, such as the musical chair and the helicopter) are not from the examination point of view.
•Most scoring part: counting the favourable and the total outcomes correctly
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