Probability — Formula Sheet
Madhya Pradesh Board · Class 10 · Mathematics
6 formulas from Probability (Madhya Pradesh Board Class 10 Mathematics) on one page, grouped by topic. Covers Basic Idea of Probability, Important.
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Formulas and Key Relations
3) Probability Formulas
P(E) = (Number of trials in which the event happened) / (Total number of trials)
P(\bar{E}) = 1 - P(E)
0 \leq P(E) \leq 1
P(E) + P(F) = 1
Standard Examples from Coins, Dice, Balls, and Cards
For one coin toss, the outcomes are head and tail, so P(head) = 1/2 and P(tail) = 1/2.
For a die, getting a number greater than 4 has 2 favourable outcomes: 5 and 6, so probability is 2/6 = 1/3.
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