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AlexFokin [52]
2 years ago
12

Nico owns 11 instructional piano books. Two are beginner books, six are intermediate books, and three are advanced books. If two

books are randomly chosen from the collection, one at a time, and replaced after each pick, what is the probability that he first chooses an advanced book and then chooses a beginner book? StartFraction 5 Over 121 EndFraction StartFraction 6 Over 121 EndFraction Five-elevenths Six-elevenths.
Mathematics
2 answers:
Leona [35]2 years ago
7 0

The probability that he first chooses an advanced book and then chooses a beginner book is 6/121.

<h3>Probability</h3>

Given:

Beginner book=2

Intermediate book=6

Instructional piano books=11

Advanced books=3

Hence:

Probability=(2×3)÷(11×11)

Probability=6/121

Therefore the probability that he first chooses an advanced book and then chooses a beginner book is 6/121.

Learn more about probability here: brainly.com/question/24756209

#SPJ2

lisabon 2012 [21]2 years ago
3 0

Answer: c . 6/121

Step-by-step explanation: 100% on edge

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Answer:

Volume of the sphere up to two decimal places= 4.19 cubic yards

Surface area of the sphere up to two decimal places  =12.56 square yards

Step-by-step explanation:

Given:

The radius of the sphere= 1 yard

Volume of a Sphere:

                        \frac{4}{3}* \pi *r^3                                                         :\pi =\frac{22}{7} =3.14

               =\frac{4}{3}*3.14*1*1*1

               =4.187 cubic yards

Volume of the sphere up to two decimal places= 4.19 cubic yards

Surface area of the sphere= 4*\pi* r^2

                                           =4*3.14*1*1

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A foreign tourist went shopping in a shop in Hungary with only euros. Luckily for him, the shop accepted euros. At the end of th
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Given:

Total students = 60

Student passed = 85%

To find:

The number of students who failed and  then convert it in %.

Solution:

We have,

Number of passed student = 85% of Total students

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So, number of passes students is 51.

Number of students who failed = Total students - Passes students

                                                    = 60-51

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So, number of students who failed is 9.

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\text{Fail}\%=\dfrac{9}{60}\times 100

\text{Fail}\%=15

Therefore, 15% students fail in the test.

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3 years ago
80 percent of x is equal to 100<br><br> What is x?
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