Classes X, XI & XII Mathematics
Chapter 14: Probability
Standard NCERT & CBSE aligned study curriculum. Master concepts, track accuracy, revise weak areas, and challenge yourself with 9 customized practice modes.
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Syllabus Sections
Key Formulas & Equations
Click Copy to duplicateComplementary Probability
P(E) + P(\bar{E}) = 1
Sum of probability of an event and its complement is exactly 1.
Related Formulas from Adjacent Chapters
Grouped Mean (Direct)
\bar{x} = \frac{\sum f_i x_i}{\sum f_i}
[From Statistics] Calculates mean of grouped distribution.
Grouped Mode
\text{Mode} = l + \left(\frac{f_1 - f_0}{2f_1 - f_0 - f_2}\right) h
[From Statistics] Finds mode of grouped data where l is lower boundary of modal class.