Column Bet for Roulette
Roulette column bet dey cover twelve numbers for one line wey stand up for di layout.

Twelve numbers, e dey pay 2:1. ProbabilitymathsProbabilityDi chance of one outcome, from 0 to 1 or from 0% to 100%. One number: 1/37 = 2.70%.Read di whole tin → 32.43%. Di same odds as dozen, with different numbers.
Columns for roulette table
Di three “2:1” boxes for di foot of di layoutequipmentLayoutDi betting grid wey dem print for di table. Dem also dey call am: table, felt, cloth.Read di whole tin →, one under each columnbetColumnTwelve numbers for one column of di layout wey stand from up to down, e dey pay 2:1.Read di whole tin →. Column 1 get 1, 4, 7 … 34; column 2 get 2, 5, 8 … 35; column 3 get 3, 6, 9 … 36. Each one must reach di table minimum by imself. ZerowheelZeroDi one green pocket wey no even-money, dozen or column bet dey cover; na im be di source of di house edge. Dem also dey call am: single zero, 0.Read di whole tin → no dey inside any column.
Payout of roulette column and wetin you fit expect
Di same as dozenbetDozen1–12, 13–24 or 25–36, e dey pay 2:1.Read di whole tin →: fair odds 2.083 to 1, di table dey pay 2, expected lossmathsExpected lossExpected value times di total moni wey you bet; di average amount wey you go lose for one session or one period.Read di whole tin → na 2.70% of di stake, standard deviationmathsStandard deviationSquare root of variance; di normal distance between one result and di expected value.Read di whole tin → 1.39 for every unitmoniUnitDi base stake wey system or player dey work with. Dem dey describe progressions in units so dat dem go fit work for any table.Read di whole tin →.
How di colours mix
Di colours for di columns no balance. Column 1 get six redbetRedEven-money bet on di 18 red numbers. For French: rouge.Read di whole tin → and six blackbetBlackEven-money bet for di 18 black numbers. For French: noir.Read di whole tin →. Column 2 get four red (5, 14, 23, 32) and eight black. Column 3 get eight red and four black (6, 15, 24, 33). Dis one matter only if you join column with colour bet and you want sabi how often both go win: column 3 plus red dey win both for eight numbers, while column 2 plus red dey win both for four.
Why roulette columns dey feel different from dozens
Dozen na twelve numbers wey follow each oda; column dey jump two between each one. For di wheel, both dey scatter, so no one of dem na sectorwheelSectorPockets wey follow each oda for one arc of di wheel, no be group for di layout.Read di whole tin →. Di difference na only for di look, but na why dem dey sell “column systems” and “dozen systems” as different products, even though na di same bet.
Combinations
Two columns, like two dozens, dey win 24 out of 37 spins for net of one unit. Column plus dozen dey share four numbers (column 1 and di first dozen share 1, 4, 7, 10), and dem cover 20 numbers with double hit for four of dem. Di Bet Builder tool dey show di exact distribution.
Questions wey pipo dey ask
For di foot of di grid, under 34, 35 and 36. For French layout wey get two ends, dem dey sit for di end wey far from zero.
No. Zero dey sit above all di three columns and e no belong to any.
Small laugh

Di same odds, different numbers, different font.
Sources
- Ethier, S. N. The Doctrine of Chances: Probabilistic Aspects of Gambling.