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Alex73 [517]
3 years ago
12

What is 7,782 rounded to the nearest hundred? I am guessing it's 7800

Mathematics
2 answers:
nexus9112 [7]3 years ago
7 0
Yes it is 7800 good job
Pani-rosa [81]3 years ago
3 0
I think its 7,900 if not then you are correct
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A test consists of 10 true or false questions. To pass the test a student must answer at least eight questions correctly. If the
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<h3>The probability of  student passing the quiz with  at least 50% of the questions correct is 0.05457.</h3>

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Here, the total number of T/F question = 10

The minimum answers needed correctly answered = 8

So, student needs to answer at least 8 questions correctly.

Here, the possibility of answering a question correctly  = (\frac{1}{2})   = p = 0.5

Also, the possibility of answering a question wrong  = (\frac{1}{2})  = q = 0.5

Now, to pass he needs to answer 8 or more (  8 , 9 or 10) answers correctly.

P(answering 8 correct answer)  = ^{10}C_8(p)^8(q)^2 = ^{10}C_8(0.5)^8(0.5)^2  = 0.0439

P(answering 9 correct answer)  =  ^{10}C_9(p)^9(q)^1 = ^{10}C_9(0.5)^9(0.5)^1  = 0.0097

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So, the total Probability   = P(8) + P(9) + P(10)

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Hence, the probability that the student passes the quiz  with  at least 8 of the questions correct is 0.05457.

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