The girls group rented 2 canoes and 3 inner tubes for a total cost of $80. The boys group rented 1 canoe and 7 inner tubes for a
1 answer:
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Answer:
The correct option is D.
Step-by-step explanation:
The linear regression equation is in the form of
Where,
The formula of r is
The values are
Using above formula, we get
Therefore option D is correct.
Answer:
The number of tests required is 330.
Step-by-step explanation:
We have to find the total number of combinations of four wires.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.
In this question:
Four wires from a set of 11.
So
The number of tests required is 330.