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This symbol is an <u>absolute value</u> symbol. It means that we are looking for that number's distance from 0. There is no such thing as a negative distance; the distances are all positive, so both ∣9∣ and ∣-9∣ have a value of 9.
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Answer:
the answer is c
Step-by-step explanation:
Answer:30
Step-by-step explanation:
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.