# Darts game

**Objective:** Calculate the points scored in Darts game.

Darts is a game where players throw darts at a board like the one in the image. For this exercise we will define a **set** as the set of 10 throws per player. A **game** will be 3 sets per player.


In our particular instance of the game, the target rewards 4 different amounts of points, depending on where the dart lands:

- If the dart lands outside the target, player earns no points (0 points).
- If the dart lands in the outer circle of the target, player earns 1 point.
- If the dart lands in the middle circle of the target, player earns 5 points.
- If the dart lands in the inner circle of the target, player earns 10 points.

The outer circle has a radius of 10 units (this is equivalent to the total radius for the entire target), the middle circle a radius of 5 units, and the inner circle a radius of 1. Of course, they are all centered at the same point — that is, the circles are concentric defined by the coordinates (0, 0).

## Tasks

Given the following type:

type DartThrow {
    x: number
    y: number
}

1. Write a function `throwDart(range: number): DartThrow` to produce a random throw within a range.
2. Use it to generate the data of a singe player set of 10 throws with an 80% chance to hit the board.
3. Calculate the total score of the player.

## Bonus

1. Write a function `throwDartWithChance(insideBoardChance: number): DartThrow` that can be used to generate a throw with a particular chance to hit the board.