Challenge Solution

solution.js

let getRandBetween = function(min, max) {
  Math.random() * (max - min + 1) + min;
}

let getRandCoord = function(minX, minY, maxX, maxY) {
  let opt = function() {
      return Math.random() > 0.5;
  };

  return opt() ? 
      {
          x: opt() ? minX : maxX,
          y: getRandBetween(minY, maxY)
      } 
      :
      {
          x: getRandBetween(minX, maxX),
          y: opt() ? minY : maxY
      };
};

3 corrections I think...
-getRandBetween does not return anything
-i think getRandBetween should be ...return Math.random() * (max - min) + min;
-You are assigning a 25% chance the point you will return will be on each side of the rectangle. But if you really wanted to give equal chance of any point on the rectangle coming up then you would expect that a rectangle with that is 100 units high and only 1 unit wide will almost definitely return a point on one of its vertical sides but that's not what's happening here.

I could be misunderstanding the problem but that's my current interpretation.