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
Serga [27]
3 years ago
7

The probability that a randomly selected teenager watched a rented video at least once during a week was 0.75. What is the proba

bility that at least 5 teenagers in a group of 7 watched a rented movie at least once last week? (Round your answer to four decimal places.)
Mathematics
1 answer:
Evgesh-ka [11]3 years ago
8 0

Answer:

0.7564

Step-by-step explanation:

Let X be the event of watching a rented video at least once during a week,

Given,

The probability of watching a rented video at least once during a week was, p = 0.75,

So, the probability of not watching a rented video at least once during a week was, q = 1 - p = 0.25,

Binomial distributive formula,

P(x)=^nC_x p^x q^{n-x}

Where,

^nC_x=\frac{n!}{x!(n-x)!}

Hence, the probability that at least 5 teenagers in a group of 7 watched a rented movie at least once last week,

P(X ≥ 5) = P(X=5) + P(X=6 )+ P(X=7)

=^7C_5 0.75^5 0.25^{7-5}+^7C_6 0.75^6 0.25^{7-6}+^7C_7 0.75^7 0.25^{7-7}

=21 (0.75)^5 (0.25)^2 + 7 (0.75)^6 0.25 + 0.75^7

=0.756408691406

\approx 0.7564

You might be interested in
Qfind the product. Write the product in simplest form 1 2/3 x 4 2/5
Elan Coil [88]
1 2/3 = 5/3
4 2/5 = 22/5
5/3•22/5= 110/15
= 22/3
7 0
3 years ago
Whoever can answer all these get brainliest please! this is due today!!
OLEGan [10]
#1 is -32
#2 is -11
#3 is -5
#4 is 6
3 0
3 years ago
How do you determine a scale factor for two similar figures? <br> 15 points
mr_godi [17]

the scale factor or ratio of two similar figures, will be the same as the ratio of their perimeter, or even the ratio of two corresponding sides.


for example, we have say, an irregular octagon with a perimeter of say 13, and a similar octagon with a perimeter of 39, then


\bf \cfrac{\textit{small octagon}}{\textit{large octagon}}~\hspace{5em}\cfrac{perimeter}{perimeter}\implies \cfrac{13}{39}\implies \stackrel{simplified}{\cfrac{1}{3}}~\hfill \stackrel{\textit{scale factor}}{1:3}


which is another way to say, the smaller is 1/3 of the larger one, or the larger one is 3 times as the smaller one.

4 0
3 years ago
Read 2 more answers
Mateo is making 2Gallons of fruit punch. How many pints of fruit punch is he making
Sever21 [200]
1 gallon = 8 pints
so if we times that by 2
we get 16
so 16 pints is your answer
5 0
3 years ago
Read 2 more answers
What is the value of x? HELP
algol13

Answer;

50 :) Because 105 minus 55 is 50 hope this helped you out :))

4 0
3 years ago
Other questions:
  • 20 pts need this question asap
    8·1 answer
  • What is an equation of the line with slope 3/2 and y-intercept −1?
    10·2 answers
  • Mike purchases a round wall clock. The clocks radius is 10m. What is the circumference of the clock.
    14·1 answer
  • Simplify and leave in radical form. <br> 8√x^2 y^6
    10·2 answers
  • What is the acronym used to describe the order of operations?
    10·1 answer
  • WHAT WOULD THIS BEEE!!
    11·2 answers
  • Jim orders prints from a website. The site charges him $6.95 a month and $0.04 for each print he orders.
    6·2 answers
  • If f ( x ) = x 4 + 6 , g ( x ) = x − 5 and h ( x ) = √ x , then f ( g ( h ( x ) ) ) =
    14·1 answer
  • Monica and Lauren know that they will need a lot of money in order to make the purchases necessary for a successful bakery. They
    9·1 answer
  • Is the ordered pair (0, 4) a solution of the inequality y≤x−3? Explain.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!