How to random model in django?

Question

User on main.html can choose category from select and get the question. App list all filtered questions by category. How to random questions and show the only one question?

I see, the all questions are qs in ShowFilterView, but how take questions and randomize them?

views.py:

def is_valid_queryparam(param):
    return param != '' and param is not None

def filter(request):
    qs = Cards.objects.all()
    categories = Category.objects.all()
    category = request.GET.get('category')

    if is_valid_queryparam(category):
        qs = qs.filter(categories__name=category)

    return qs

def MakeFilterView(request):
    qs = filter(request)
    context = {
        'queryset': qs,
        'categories': Category.objects.all()
    }
    return render(request, "cards/main.html", context)

def ShowFilterView(request):
    qs = filter(request)
    context = {
        'queryset': qs,
        'categories': Category.objects.all(),
    }
    return render(request, "cards/result.html", context)

models.py:

class Question(models.Model):
    name = models.CharField('Вопрос', max_length=30)

    def __str__(self):
        return self.name

class Category(models.Model):
    name = models.CharField('Категория', max_length=20)

    def __str__(self):
        return self.name

class Cards(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    categories = models.ManyToManyField(Category)

    def __str__(self):
        return str(self.question)

result.html:

{% extends 'base.html' %}

{% block content %}
        {% for cards in queryset %}
          {{ cards.question.name }}<br/>
        {% endfor %}
{% endblock %}