What is the relative frequency of the revenue earned by B and B Motors from sales of mini trucks compared to the total sales revenue earned by all four companies?

To determine the relative frequency of the revenue earned by B and B Motors from mini truck sales compared to the total sales revenue of all four companies, you would need the specific revenue figures for B and B Motors and the total revenue of all companies. The relative frequency can be calculated by dividing B and B Motors' mini truck sales revenue by the total sales revenue of all companies, and then multiplying by 100 to express it as a percentage. Without the actual figures, a precise answer cannot be provided.