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
tensa zangetsu [6.8K]
3 years ago
7

In a survey of consumers aged 12 and​ older, respondents were asked how many cell phones were in use by the household.​ (No two

respondents were from the same​ household.) Among the​ respondents, answered​ "none," said​ "one," said​ "two," said​ "three," and responded with four or more. A survey respondent is selected at random. Find the probability that​ his/her household has four or more cell phones in use. Is it unlikely for a household to have four or more cell phones in​ use? Consider an event to be unlikely if its probability is less than or equal to 0.05.
Mathematics
1 answer:
bogdanovich [222]3 years ago
6 0

Answer:

The probability that​ his/her household has four or more cell phones in use is 0.122 or 12.2%.

Step-by-step explanation:

<u>The complete question is</u>: In a survey of consumers aged 12 and​ older, respondents were asked how many cell phones were in use by the household.​ (No two respondents were from the same​ household.) Among the​ respondents, 215 answered​ "none", 280 said​ "one", 362 said​ "two", 149 said​ "three," and 140 responded with four or more. A survey respondent is selected at random. Find the probability that​ his/her household has four or more cell phones in use. Is it unlikely for a household to have four or more cell phones in​ use? Consider an event to be unlikely if its probability is less than or equal to 0.05.

We are given that among the​ respondents, 215 answered​ "none", 280 said​ "one", 362 said​ "two", 149 said​ "three," and 140 responded with four or more.

A survey respondent is selected at random.

As we know that the probability of any event is calculated as;

                Probability = \frac{\text{Favorable number of outcomes}}{\text{Total number of outcomes}}

Here, we have to find the probability that​ his/her household has four or more cell phones in use;

Number of respondent having four or more cell phones in use = 140

Total number of respondents asked = 215 + 280 + 362 + 149 + 140 = 1146

<u>So, the required probability</u> = \frac{140}{1146}

                                              = 0.122 or 12.2%

No, it is not unlikely for a household to have four or more cell phones in​ use because the probability is not less than or equal to 0.05 but in actual it is greater than 0.05.

You might be interested in
last summer, at camp okey-fun-okey, the ratio of the number of boy campers to girl campers was 8:7. If there were a total of 195
Evgen [1.6K]

The ration of boy campers to total campers is 8:15, and the ratio of girl campers to total campers is 7:15.  Using this information, we can answer this question by setting up proportions.

<u>For boys:</u>

\frac{8}{15} =\frac{x}{195}

<em>*Cross multiply*</em>

15x=1560

<em>*Divide both sides by 15*</em>

x=104

There are 169 boy campers.


<u>For girls:</u>

\frac{7}{15} =\frac{x}{195}

<em>*Cross multiply*</em>

15x=1365

91=x

There are 91 girl campers.


Hope this helps!!

7 0
3 years ago
Read 2 more answers
Mrs.Henderson had 7/12dozen eggs in her refrigerator.Then she used 1/6 dozen eggs to make a cake.What fraction of a dozen is lef
zhuklara [117]
Ok so to find the eggs left we need to subtract but with fractions, you need a common denominator. You can multiply 1/6 by 2 because 6·2=12 which will be the same denominator as 7/12. You must multiply the numerator by 2 as well so 1/6· 2/2= 2/12. Now subtract 7/12 - 2/12 and you have 5/12 eggs left. :)
5 0
3 years ago
Read 2 more answers
Please answer today!
Svet_ta [14]

Answer:

#1. A. C. D.

#2. D. F.

3^4 equals 81 and so do answer D. & F.

8 0
2 years ago
Read 2 more answers
You get scores of 85 and 91 on two history test.Wright and solve an inequality to find the scores you can get on your next histo
Goryan [66]
Let x = score on next test
(85+91+x)/3\geq90
x\geq94
5 0
3 years ago
Which of the following shows figure T rotated 90 degree clockwise around the origin?
abruzzese [7]
The last one shows the right transformation.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Danny's Bike Shop sells a certain model of racing bike for $550. The same bike can be bought at a competing shop for 7 percent l
    15·1 answer
  • Can I have some help with some math does anyone know some math they could help me with ​
    11·2 answers
  • HOS
    12·1 answer
  • Latoya drove 210 miles using 9 gallons of gas. At this rate how many gallons of gas would she need to drive 413 miles?
    14·1 answer
  • Can someone help me with this?
    13·1 answer
  • Item 15
    11·1 answer
  • Suppose y varies directly with x. Write a direct variation equation to relate x and y if y = 10 when x = 2
    5·2 answers
  • 1 - 2x + 3y for x = -2 and y= -5
    5·2 answers
  • Find the volume of a solid cylinder with base radius 10cm and height 14cm(take Pie=22/7) pls its urgent thank u AND GOD BLESS U
    6·2 answers
  • Nicholas used a $10 bill to pay for a granola bar that only costs ppp dollars.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!