Simplify the expression 2x+2x(x−3x)+7
1 answer:
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Answer:
0.999
Step-by-step explanation:
Assuming that there are ten questions.
This yields:
Each answer has an equal chance of being selected.
Therefore, the probability of the answer =
But we assume 10 questions, therefore, the probability will be given as follows:
P (Ans) =
=
= 0.000977
This is the probability of getting them all wrong.
The probability of getting the answer right is given by p(Right answer) = 1 -0.000977 = 0.9990