“The odds are 50%.”
Usage Entry 1461 / 1605 60-second read
Probability vs. Odds
Likelihood expressed as a fraction versus a ratio.
The comparisoni
“The probability is 50% (or 1/2). The ODDS would be 1:1 (one win for every loss) — odds and probability use different formats.”
The ruleii
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PROB = fraction. ODDS = ratio.
PROBABILITY: a fraction between 0 and 1 (or 0–100%). ODDS: a ratio of success to failure. 50% probability = 1:1 odds. 75% probability = 3:1 odds. Bookmakers and statisticians both use both — pick correctly.
Memory aidiii
Remember it like this
50% = 1:1 odds.