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3 years ago

When buying a candy bar, there is a 20% chance that it will also include a coupon for a second candy bar. A student

Mathematics

2 answers:

Aleks04 [339]3 years ago

5 0

Answer:

Step-by-step explanation:

Solnce55 [7]3 years ago

3 0

<h2>Answer:</h2>

To estimate the probability that more than 2 out of 7 candy bars will include a coupon, the student must count the number of trials with more than two 1's. and divide by the number of trials.

This gives an estimated probability of about 0.1875.

<h2>Step-by-step explanation:</h2>

1 represent a candy bar with a coupon and numbers 2 through 5 represent a candy bar without a coupon.

Now we are asked to find the probability that, if she buys 7 candy bars, more than 2 will include a coupon.

Total number of outcomes=16

Number of favorable outcomes(i.e. the outcome which have more than 2 one) = 3

( Since the outcomes are: 2113415 4341112 1455141 )

Hence, the probability is the ratio of Number of favorable outcomes to the total number of outcomes.

i.e. $Probability=\dfrac{3}{16}\\\\\\Probability=0.1875$

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Solve the following equation 2x=12

Luden [163]

Let's solve your equation step-by-step.
2
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Step 1: Divide both sides by 2.
2
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2
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Answer:
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6 0

1 year ago

The latest poll from ESPN asked fans what their favorite sport was, considering pro, college and highschool levels. Out of 1000

shepuryov [24]

Answer:

Confidence interval is $0.2911$

Step-by-step explanation:

Given that 32% of fans sport is basketball as favorite sport. So total number of fans is,

$32\%\times 1000$

$= \dfrac{32}{100}\times 1000$

$=320$

So 320 fans favorite sport is basket ball.

Now find sample proportion ,

$\widehat{p}=\dfrac{number\:of\:people\:in\:the\:sample}{total\:number\:of\:people}$

Substituting the value,

$\widehat{p}=\dfrac{320}{1000}$

$\widehat{p}=0.320$

Formula for confidence interval is,

$CI=\widehat{p}\pm z\sqrt{\dfrac{\widehat{p}\left (1-\widehat{p}\right )}{n}}$

To calculate the z value.

$Confidence Level=1-\alpha$

$0.95=1-\alpha$

$0.05=\alpha$

Now divide above value by 2,

$\dfrac{0.05}{2}=\dfrac{\alpha}{2}$

$0.025=\dfrac{\alpha}{2}$

To find the value of z score calculate the area under the curve as follows

$A=\dfrac{1+CL}{2}$

$A=\dfrac{1+0.95}{2}$

$A=\dfrac{1.95}{2}$

$A=0.975$

On z table, find the value of 0.975. So the row corresponding to 0.975 is 1.9 and column corresponding to 0.975 is 0.06. Adding these two values the z score is 1.96.

or find the value from excel by using command as follows,

=NORM.S.INV(0.025)= -1.959963985

Now substituting the value,

$CI=0.320\pm 1.96\sqrt{\dfrac{0.320\left (1-0.320\right )}{1000}}$

$CI=0.320\pm 0.02891$

Lower end of the interval is,

$CI=0.320- 0.02891$

$CI=0.2911$

Upper end of the interval is,

$CI=0.320+ 0.02891$

$CI=0.3489$

Therefore 95% confidence interval is $0.2911$

7 0

2 years ago

How many 90 degree angle does it take to make a full turn

ser-zykov [4K]

Full turn = 360°

Number of 90° = 360 ÷ 90 = 4

-------------------------------------------------------
Answer: It takes 4 90° to make a full turn.
-------------------------------------------------------

7 0

2 years ago

Read 2 more answers

The difference of the squares of two positive consecutive even integers is 7676. find the integers. use the fact that, if x rep

myrzilka [38]

Equation is (x+2)^2 - x^2 = 7676
solve the equation by first opening the bracket of (x+2)^2 by A^2 + 2AB +C^2

you'll end up with 4x + 4 = 7672
thus x = 1918 and the next number is 1920.

5 0

3 years ago

0/1 Hannah went to the store and spent $14. 69 on a book, $20. 99 on a shirt, and $5. 99 on a pack of pencils. If she paid with

tester [92]

Answer:

$8.33

Step-by-step explanation:

$14.69 50.00

+ $20.99 - 41.67

=35.68 = $8.33

+5.99

=$41.67

5 0

2 years ago