Answer:
0.999
Step-by-step explanation:
At least 1 correct means, 1 correct, 2 correct, 3 correct ... until 10 correct. That would be a long process to calculate.
<em>Instead we use the complement rule to calculate.</em>
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<em>So we need to find P(x<1). So this is getting 0 answers correct, or 10 incorrect.</em>
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In true false question, probablity of correct is 1/2 and incorrect is 1/2, hence,
Probability of 10 incorrect is (1/2)^10
Thus,

So the answer is 0.999 (rounded to nearest thousandth)
Its average speed rounded to 1dp is 54.76 miles per hour.
<h3>Average speed</h3>
Using this formula
Average speed=Distance/Time
Where:
Total Distance =230 miles
Time= 4.2 hours
Let plug in the formula
Average speed=230/4.2
Average speed=54.76
Inconclusion Its average speed rounded to 1dp is 54.76 miles per hour.
Learn more about average speed here:brainly.com/question/4931057