ODDS → PROBABILITY
Enter odds as a:b • outputs P(event)
P = a ÷ (a+b) • NO SCROLL
ODDS TYPE
FOR
FOR: P = a/(a+b)
ROUNDING
2DP
Decimal and % rounding
a (FAVOURABLE)
3
Whole number ≥ 0
b (UNFAVOURABLE)
2
Whole number ≥ 0
REMINDER
Odds FOR: a to b means a wins, b loses
Total parts = a + b
WORKING
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PROBABILITY
READY
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ODDS TYPE
FOR
FOR: P = a/(a+b)
ROUNDING
2DP
Decimal and %
a
3
Whole number
b
2
Whole number
WORKING
—
—
—
—
—
PROBABILITY
READY
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PAGE 1/2
HOW TO USE
1) Choose odds FOR/AGAINST
2) Enter a and b
3) Press SOLVE
4) Read fraction, decimal, %
ODDS FOR
Odds FOR = a:b
P(event) = a ÷ (a+b)
Total parts is a+b
ODDS AGAINST
Odds AGAINST = a:b
P(event) = b ÷ (a+b)
Swap favourable/unfavourable
WORKED EXAMPLE
Odds FOR 3:2
P = 3/(3+2) = 3/5
= 0.6 = 60%
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