Joanna works in a marina. Boat servicing costs $70.00, plus $4.50 for each litre of oil. Joanna serviced a boat and made out a b
1 answer:
You might be interested in
Answer:
Step-by-step explanation:
In this problem we are calculating the relative frequency conditional by columns.
Therefore the sum of the frequencies of each column must be equal to 1.
Then we use this condition to calculate the values of a and b
So:
Finally