Please Help Me.... I need Help Help Badly If i dont Get my Grade Up ima Be Sent to Boot Camp

On an eight question true-false quiz, a student guesses each answer. What is the probability that he/she gets at least one of th

Fantom [35]

Answer:

$P[at\ least\ 1] = 0.9961$

Step-by-step explanation:

Given

$Questions = 8$

$Quiz\ Type = True\ or\ False$

Required

Probability that s/he gets at least one correctly

First, we calculate the probability of answering a question correctly

Since, there are just 2 choices (true or false), the probability is:

$P(correct) = \frac{1}{2}$

Similarly, the probability of answering a question, wrongly is:

$P(wrong) = \frac{1}{2}$

The following relationship exists, in probability:

$P[at\ least\ 1] = 1 - P[none]$

So, to calculate the required probability.

First, we calculate the probability that he answers none of the 8 questions correctly.

$P[none] = p(wrong)^8$

$P[none] = (\frac{1}{2})^8$

Substitute $P[none] = (\frac{1}{2})^8$ in $P[at\ least\ 1] = 1 - P[none]$

$P[at\ least\ 1] = 1 - (\frac{1}{2})^8$

$P[at\ least\ 1] = 1 - \frac{1}{256}$

Take LCM

$P[at\ least\ 1] = \frac{256 - 1}{256}$

$P[at\ least\ 1] = \frac{255}{256}$

$P[at\ least\ 1] = 0.9961$

Hence, the probability that s/he gets at least one correctly is 0.9961

6 0

3 years ago

Please help i’m desperate What is y-1 =2(x +3) in standard form?

kakasveta [241]

Answer:

y-1=2(x+3)

y-1=2x+6

y=2x+6+1

y=2x+7

8 0

3 years ago

A function is a relation in which each element in the input is mapped to how many elements in the output?

Scilla [17]

One input can map out multiple outputs

7 0

2 years ago

When figuring a tip at a restaurant it is customary to leave:

Vaselesa [24]

Answer:

c. 15% or more

Step-by-step explanation:

3 0

3 years ago

There are roughly 4,740 Walmart stores in the United States, where the population is approximately 332.4 million people. How man

MatroZZZ [7]

The number of Walmart Stores are there per 100,000 people is 1.43 stores

What does per 100,000 people mean?

It means the number of stores that could attend to 100,000 customers out of the total store number of 4,740

The first task in this case, is to first of all determine the number of store per person, which is the total number of stores divided by the total population

store per person=4,740/ 332,400,000

number of stores per person= 0.000014260

number of stores per 100,000 people=number of stores per person*100,000

number of stores per 100,000 people=0.000014260*100,000

number of stores per 100,000 people=1.43

Find out more about more about service business on:brainly.com/question/24553900

#SPJ1

6 0

1 year ago