Probabilit is positive events / total number of events
In this case the positive events is to pick a cap that is not green and the total number is 80 (the number of caps).
The number of not green caps is 80 - 12 = 68.
Then the probability the cap selected will not be green is 68 / 80 = 17 / 20
Answer:
to make it perpendicular the slope as to be -5 (opposite reciprocal of the original)
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