Math.Random not working correctly typescript

Simple question but I can't find the answer, I'm pretty bad with maths. The thing is that i have this formula to generate a random number.

public randomize(min, max) {
    console.log("minimo: " + min);
    console.log("maximo: " + max);

    return this.numRandomed = Math.floor(Math.random()*(max-min+1)+min);
}

But the random number is always lower than the min number, isn't inside the range, I don't know why...

Any clue?? Thank you!!