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White raven [17]
3 years ago
14

A student takes an 18 question multiple choice exam with five Choices for each question and guesses on each question. Assume the

variable
Is binomial. Find the probability of guessing at least 14 out of 18 correctly
Mathematics
1 answer:
serg [7]3 years ago
8 0
You will get 10 because if you guess you won’t get nothing if your a bad guess
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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B4%7D%20%20%2B%20%20%5Cfrac%7B1%7D%7B2%7D%20" id="TexFormula1" title=" \fra
Gnesinka [82]

Answer:

5/4

Step-by-step explanation:

You just need to multiply 1/2 by 2 to give you a common denominator:

3/4+2/4

From there you can add the numerators:

5/4

HTH :)

5 0
3 years ago
Brody is purchasing some tools for his workshop. He has a budget of $120 and needs to buy at least 14 tools. Each hammer costs $
STatiana [176]

Answer:

For this case, the first thing we must do is define variables:

x: number of hammers

y: number of wrenches

We write the system of inequations:

10x + 6y <= 120

x + y> = 14

Step-by-step explanation:

5 0
3 years ago
Which of the following is a polynomial A.x^2+2 B.(x^8-2)/(x^-2+3) C. 7x^7-2x^-4+3 D.x^x-1
EastWind [94]
<span> A. x²+2   - a  polynomial
B.(x⁸-2)/(x⁻²+3)  rational function
C. 7x⁷-2x⁻⁴+3 (It has negative value of exponent, so it cannot be a polynomial.)
D.x^x-1 (x is an exponent it cannot be a polynomial)</span>
6 0
3 years ago
Simplify the complex rational expression
jasenka [17]

Answer:

2(x+2)/x+1

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
How to round 254 to the nearest hundred
Lisa [10]
One way is using the rules.

7 0
3 years ago
Read 2 more answers
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