Class 9 · Chapter 7
The Mathematics of Maybe: Introduction to Probability
Chance, experimental probability, and simple events.
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Ganita Manjari · Class 9 (2026-27)
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Detailed theory
Assume all outcomes equally likely. Total sample space size in denominator, favourable count in numerator.
Key concepts & formulas
01
**Probability** = favourable / total (equally likely outcomes).
02
; ; .
03
Sum of probabilities of all outcomes .
04
Complement: .
05
Experimental: fraction of times an event occurs.