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Oksi-84 [34.3K]
2 years ago
12

QUESTION: Image below 20points!!!

Mathematics
1 answer:
il63 [147K]2 years ago
6 0

Answer:

Step-by-step explanation:

X. 2 2 -3

-4 -6 2

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Answer:

B. 97%

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Mike and Julie surveyed students to determine how many had a grade of A in math. They recorded their findings for each survey in
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A multiple-choice standard test contains total of 25 questions, each with four answers. Assume that a student just guesses on ea
weqwewe [10]

Answer:

a)  8*88*10⁻⁶ ( 0.00088 %)

b) 0.2137 (21.37%)

Step-by-step explanation:

if the test contains 25 questions and each questions is independent of the others, then the random variable X= answer "x" questions correctly , has a binomial probability distribution. Then

P(X=x)= n!/((n-x)!*x!)*p^x*(1-p)^(n-x)

where

n= total number of questions= 25

p= probability of getting a question right = 1/4

then

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3 years ago
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