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sweet-ann [11.9K]
3 years ago
13

A Stats test has 5 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each o

f the 5 questions, what is the probability that you get exactly 2 questions correct
Mathematics
1 answer:
IgorLugansk [536]3 years ago
8 0

Answer:

0.0512

Step-by-step explanation:

Probability of making a correct guess ; p = 1 / 5 = 0.2

q = 1 - p = 1 - 0.2 = 0.8

Number of questions, n = 5

Using the binomial probability relation :

P(x = x) = nCx * p^x * q^(n-x)

P(x = 3) = 5C3 * 0.2^3 * 0.8^2

P(x = 3) = 0.0512

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3 years ago
Read 2 more answers
What is the measure of an anglethat is supplementary to an angle of 37°? A. 127° B. 53° C. 143° D. 323°​
KengaRu [80]

<u>Answer:</u>

143°

option c is correct!

<u>Explanation:</u>

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Let another angle be x°

= > 37° + x° = 180

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Therefore another angle is 143°.

8 0
2 years ago
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