1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DaniilM [7]
3 years ago
12

Omar ordered his sister a birthday card from a company that randomly selects a card from their inventory. The company has 21 tot

al cards in inventory. 14 of those cards are birthday cards. What is P(not a birthday card)​
Mathematics
1 answer:
Ksju [112]3 years ago
8 0

Answer:

P = 7

Step-by-step explanation:

We have 21 total cards and out of those 21 cards, 14 of those are birthday cards. So that means that the amount of cards that are not birthday cards is the number of cards subtracted by the number of birthday cards, also shown as 21 - 14. So 21 - 14 = P, so now we solve what 21 - 14 is which is 7, so that means P = 7.

Let me know if you have any questions.

You might be interested in
Gustave measured his pace and determined that for him, sss steps make up one mile. One day Gustave walked 630063006300 steps, wh
storchak [24]

Answer: 3s=6300, 2100 Steps

Step-by-step explanation:

6300/ 3 will give you 2100 for each mile

7 0
3 years ago
Read 2 more answers
An Airliner has a capacity for 300 passengers. If the company overbook a flight with 320 passengers, What is the probability tha
TEA [102]

Answer:

The probability is   P(X  >300 ) = 0.97219

Step-by-step explanation:

From the question we are told that

 The capacity of  an Airliner  is  k =  300 passengers

 The sample size n =  320 passengers

  The probability the a randomly selected passenger shows up on to the airport

    p = 0.96

Generally the mean is mathematically represented as

    \mu  =  n*  p

  => \mu  =  320 *  0.96

    => \mu  = 307.2

Generally the standard deviation is  

    \sigma =  \sqrt{n *  p *  (1 -p ) }

=>  \sigma =  \sqrt{320  *  0.96 *  (1 -0.96 ) }

=> \sigma =3.50

Applying Normal approximation of binomial distribution

Generally the probability that there will not be enough seats to accommodate all passengers is mathematically represented as

  P(X  > k ) =  P( \frac{ X -\mu }{\sigma }  >  \frac{k - \mu}{\sigma } )

Here \frac{ X -\mu }{\sigma }  =Z (The \ standardized \  value \  of  \ X )

=>P(X  >300 ) =  P(Z >  \frac{300 - 307.2}{3.50} )

Now applying  continuity correction we have

    P(X  >300 ) =  P(Z >  \frac{[300+0.5] - 307.2}{3.50} )    

=>    P(X  >300 ) =  P(Z >  \frac{[300.5] - 307.2}{3.50} )

=>    P(X  >300 ) =  P(Z >  -1.914 )

From the z-table  

    P(Z >  -1.914 ) =  0.97219

So

    P(X  >300 ) = 0.97219

8 0
3 years ago
Darrin put the numbers 7.25, 7.52, 5.72 and 5.27 in order from the greatest to the least. Is his work correct? Explain.
vampirchik [111]
No his work is not correct because 5.72 is larger than 5.27. so therefore you can not be correct
3 0
3 years ago
Read 2 more answers
The formula for the volume of a cylinder is Y = gr). Solve y = grn for h, the height of the cylinder. O A. = O B. has Yr2 OC. h
gregori [183]
Since we have to solve the given formula for h(height) so, the correct option is (a)
4 0
3 years ago
A dieter believes that the average number of calories in a homemade peanut better cookie is more than the average number of calo
zalisa [80]

The confidence interval formula is computed by:

Xbar ± Z s/ sqrt (n)

Where:

Xbar is the mean

Z is the z value

S is the standard deviation

N is the number of samples

 

So our given are:

90% confidence interval with a z value of 1.645

Sample size 40, 45

Mean 180, 179

Standard deviation 2, 4

 

So plugging that information in the data will give us a confidence interval:

For 1:

Xbar ± Z s/ sqrt (n)

= 180 ± 1.645 (2 / sqrt (40))

= 180 ± 1.645 (0.316227766)

= 180 ± 0.520194675

= 179.48, 180.52

For 2:

Xbar ± Z s/ sqrt (n)

= 179 ± 1.645 (4 / sqrt (45))

<span>= 179 ± 1.645 (0.596284794)</span>

therefore, the answer is letter b

8 0
4 years ago
Other questions:
  • What pair of fractions is 0.8 between on a number line
    6·1 answer
  • The sum of three numbers is 61 the second number is 5 times the first while the third is 2 less than the first find the numbers
    7·1 answer
  • Which number is the square of an integer and could also be the cube of another integer?
    11·2 answers
  • How old am I if 400 reduced by 2 times my age is 244 now PLEASE HELP!!!! 12 points!!
    7·2 answers
  • James has a part-time job that pays $155 a week. If he has already saved $260, which inequality gives the minimum number of week
    8·2 answers
  • Please help quickly! will give brainliest! no explanation is required. just a correct answer :)
    9·2 answers
  • What is the area? Plz show me step by step. :)
    15·1 answer
  • Talk to me! How are you doing?
    11·2 answers
  • Find the surface area of the cylinder using pie.
    15·1 answer
  • Which of the following statements describe this sequence: 3, 6, 9, 12...?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!