====== Lottery Combinations ======
===== Overview =====
The main purpose of lottery combinations is to generate all possible combinations of the selected main pool balls. A number of combinations is determined for these bet markets:
  * Classic (Excl. Bonus);
  * Classic (Incl. Bonus);
  * In Order From 1st;
  * Crazy;
  * Classic + Bonus;
  * Classic + Color Bonus;
  * Bonus (only when lottery has a market to add **2** power balls to the selection - then it is possible to choose power balls combinations).
===== Cashier Interface =====
Lottery combinations functionality **can be turned on / off** by clicking on the button **Combinations** at the right top corner of the lottery screen. \\ \\
{{ :cashier:2023-11-14_17_29_24-combinations_button_2.png?1400 |}} \\

After selecting an individual lottery, the cashier is presented with the lottery's own dedicated screen where all betting options can be seen depending on the selected betting markets tab - **Number Bets**, **Extra Bets**, **Color Bets**. Betting market tabs are shown if the lottery has these betting markets enabled according to the lottery's configuration. \\

At **Number Bets** and **Color Bets** cashier can pick the balls by clicking on the numbers manually or pressing on the **Quick Pick** button to select balls automatically.
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A few sections depend on the lottery’s own configuration:
  * the size and type of balls pools (**Main**, **Power**, **Bonus**) - how many and what specific type of balls are in the pools;
  * selection size - how many balls from pools could be selected. If selection is full, balls (color) in the pools are inactive to select. Important: if you want to change a ball of the selection manually, you should deselect a ball from the selection and add the other ball (color);
  * the color set - which one could be added to the selection.
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{{ :cashier:2023-11-13_13_27_14-lottery_comb._numbers_2.png?1400 |}}
==== Quick Pick ==== 
Balls can be added to the selection automatically by using the **Quick Pick** function.
{{ :cashier:2023-11-09_13_19_19-quick_pick.png?nolink&450|}}
When pressing on Quick Pick, the modal appears. If the lottery has bonus, power balls or color betting markets, it can be added to the selection by marking a checkbox at the **Quick Pick** modal.
\\ \\ The order of the actions is important:
  - At first, the checkmark of bonus, power ball or color should be marked.
  - Number of balls should be selected.
  - **Quick Pick** modal closes and then the filled selection is shown.
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==== Last Selection ==== 
Using **Last Selection** function, the selection is filled with the balls which were chosen and added to the bet slip before. **Last Selection** becomes active when any bet is added to the betting slip by using the previous balls selection which was created before. \\ \\
{{ :cashier:last_selection.gif?1400 |}}
===== Combinations Number =====
Lottery combinations depend on the selection of the balls. For example, your selection contains 3 balls (their numbers could be 11, 2, 7) from the Main Pool and it is selected that 2 balls from the selection will be drawn. Then all possible combinations of the selected balls should be 11- 2, 11-7 and 2-7 - in this case 3 combinations. \\        
The number of all possible combinations is calculated by using formula: \\ \\
//combinations = n! / (k! * (n - k)!)//  
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where //n// - number of balls selected from the pool (bonus, power balls and colors are not included in the combinations calculation), //k// - number of drawn balls.
===== Combinations Betting =====
=== Number Bets combinations === 
{{ :cashier:placing_a_bet_number_bets_1.gif?1400 |}} \\ 
=== Color Bets combinations ===
{{ :cashier:placing_a_bet_color_bets_1.gif?1400 |}}