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
kherson [118]
1 year ago
15

Each child in a class of 42 was asked to report how many pets (cat or dogs) that he orshe has. The data are summarized in the ta

ble below.Based on the data, estimate the probability that a randomly selected student fromthis class has 2 or more pets.A. 11/42 or approximately 0.26B. 15/42 or approximately 0.36C. 27/42 or approximately 0.64D. 38/42 or approximately 0.90

Mathematics
1 answer:
gavmur [86]1 year ago
5 0

Step 1

State the formula for the probability of an event

Pr(event)=\frac{required\text{ number of events }}{Total\text{ number of events}}

The required number of event= The students with 2 or more pets= 15+7+3+2+0 = 27

Total number of events=4+11+15+7+3+2+0=42

Step 2

Estimate the probability that a randomly selected student from this class has 2 or more pets.

Pr(Students\text{ with }2\text{ pets or more})\frac{27}{42}\approx0.64

Answer; Option C 27/42 or approximately 0.64

You might be interested in
Write a formula for the function g(x) obtained when the graph of f(x) = 1/x is shifted down 4 units and to the right 6 units .
charle [14.2K]

Answer:  g(x) = \frac{1}{x-6} - 4

This can be written out as g(x) = 1/(x-6) - 4

The "x-6" is in the denominator, while the "-4" is not.

=============================================================

Explanation:

We'll start with the parent function f(x) = \frac{1}{x}

When we shift 4 units down, we're subtracting 4 from the y coordinate of each point on the curve. Which is the same as subtracting 4 from f(x) because y = f(x).

So we have h(x) = f(x) - 4 = \frac{1}{x} - 4 as an intermediate step.

Then to shift 6 units to the right, we'll replace every x with "x-6". Imagine we kept the h(x) curve completely still, and instead we moved the xy axis 6 units to the left. This would give the illusion of h(x) moving 6 units to the right if we made the xy axis stay still. So that's why we go for "x-6" instead of "x+6".

Therefore, we end up with g(x) = \frac{1}{x-6} - 4

Side note: plugging in x = 6 leads to a division by zero error. This would mean x = 6 is not in the domain.

5 0
3 years ago
Suppose Sora is arguing with her mother, Jane. Jane believes that Sora eats mostly candy and doesn't eat enough fruits and veget
hichkok12 [17]

Answer:

0.027

Step-by-step explanation:

The p-value for Jane's chi-square test for goodness of fit is computed by using value of test statistic and degree of freedom.

Using Excel function CHISQ.DIST.RT(7.24,2) for computing p-value for chi-square goodness of fit test. 7.24 is the value of test statistic and 2 is degree of freedom. The resultant value is 0.026783. By rounding off to three decimal places the required p-value is 0.027.

4 0
3 years ago
Can someone please solve this problem please and thank you
WITCHER [35]
Tan² B = 4
(tan B)² = 4
tan B = ±2

Basic Angle
= tan^-1 2
= 63.4° (1dp)

B = 63.4°, 116.6°, 243.2°, 296.6°

Assuming you're actually supposed to present your answers in 0dp, then all answers apply.
8 0
3 years ago
Elibri has a spinner like the one that follow, where 3/5 of the spinner is red, 1/5 is blue and 1/5 is yellow.
slamgirl [31]

The expected value is the sum of values multiplied by their probabilities.

... 15×(1/5+1/5) + 5×(3/5) = 6+3 = 9

The expected value of a single spin is 9 points.

4 0
3 years ago
Help help help help help​
wariber [46]

Answer:

Step-by-step explanation:

1) (-6 , 2) ; (3 , -5)

Slope = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}

         = \frac{-5-2}{3-[-6]}\\\\= \frac{-5-2}{3+6}\\\\= \frac{-7}{9}\\

m = -7/9 ; (-6 , 2)

y - y₁ = m(x -x₁)

y - 2 = (-7/9)(x - [-6])

y - 2 = \frac{-7}{9}(x + 6)\\\\y -2 = \frac{-7}{9}x + \frac{-7}{9}*6\\\\y - 2 = \frac{-7}{9}x - \frac{7*2}{3}\\\\  y = \frac{-7}{9}x - \frac{14}{3} + 2\\\\y = \frac{-7}{9}x -\frac{14}{3} + \frac{2*3}{1*3}\\\\y = \frac{-7}{9}x - \frac{14}{3} + \frac{6}{3}\\\\y = \frac{-7}{9}x - \frac{8}{3}

2) (3 , -4) ; m= 3

y - y_{1} = m(x - x_{1})

y - [-4] = 3(x - 3)

y + 4 = 3x - 3*3

y + 4 = 3x  - 9

     y = 3x - 9 - 4

Ans: y = 3x - 13

3) m = 2 ; y-intercept (b) = 3/2

     y = mx + b

  Ans: y = 2x + (3/2)

4) (-1, 3 ) ;  (2 , 0)

Slope = \frac{0 - 3}{2-[-1]}

         = \frac{-3}{2+1}\\\\= \frac{-3}{3}\\\\= 1

m = 1; ( -1 , 3)

y - 3 = 1(x -[-1])

y - 3 = 1(x + 1)

y - 3 = x + 1

    y = x + 1 + 3

  Ans: y = x + 4

5)(2, 1) ;m = -3

y - 1 = (-3)(x - 2)

y - 1 = -3x + 6

   y = -3x + 6 +1

Ans: y = -3x + 7

5 0
3 years ago
Read 2 more answers
Other questions:
  • Two planes that do not intersect are __ parallel.<br><br> A. Always<br> B. Sometimes<br> C. Never
    5·2 answers
  • Simplify 9 - {x - (7 + x)}
    8·1 answer
  • Find the sum.<br> negative 48 plus 16
    6·2 answers
  • There is a daily fee for renting a moving truck, plus a charge of $0.50 per mile driven. If driven 48 miles, it costs $64 to ren
    7·2 answers
  • -x + 3 = 7<br><br> X=-4<br> X= 7<br> X= 4<br> X = -7
    10·1 answer
  • In triangle ABC, if the length of side b is 3 centimeters and the measures of /_B and /_C are 45° and 60°, respectively, what is
    12·1 answer
  • HELPPPPPPPPPPPP!!!!!!!!!!!!!!!1
    8·1 answer
  • If $1600 earned simple interest of $56.24 in 2 months, what was the simple interest rate? The simple interest rate is % (Do not
    12·1 answer
  • Simplify the expression by combining like terms.
    11·1 answer
  • At a deli counter, someone buys: 1 3/4​ pounds of ham for $14.50, 2 1/2​ pounds of turkey for $26.25, and 3/8​ of a pound of roa
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!