Greg Tossed on number cube and recorded the results. The table shows the number of times he Rolled each number. Based on the tab
2 answers:
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ANSWER
0.756
EXPLANATION
Let x represent number of correct answers.
We can find
which leads us to
which uses the compliment of to find the probability of getting at least 2 questions correct.
Note that since and
are mutually exclusive, we have
Then as we have
to answer the questions incorrectly divided by the total
to answer the questions.
Exactly 1 answer correct:
Therefore