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
Nesterboy [21]
3 years ago
5

Seven of ten students polled say that they prefer to practice for a team sport after school than before school. Based on this sa

mple, how many students would you expect out of a population of 120 to prefer to practice after school?
70

36

84

77
Mathematics
2 answers:
Firlakuza [10]3 years ago
4 0

Answer:

Number of students who to prefer to practice after school are:

  84

Step-by-step explanation:

Seven of ten students polled say that they prefer to practice for a team sport after school than before school.

this implies that 7/10 part of the population prefer to practice for a team sport after school than before school.

Population of school=120

Hence, number of students who to prefer to practice after school are

             7×120/10

         =  84

Hence, 84 students prefer to practice after school

Jet001 [13]3 years ago
3 0
7/10 is 70%
70% of 120 is 84.

So 84 people would prefer to practice after school.
You might be interested in
Determine whether the following conjecture is true or false. Give a counterexample if the answer is false.
brilliants [131]
This conjecture is false, A and C don't have to be complementary angles.

Let Angle A be 100 and Angle B be 80 degrees. They are supplementary (sum of 180).
Let Angle C be 100 and Angle B is still 80 degrees. They are supplementary.

However, Angle A and Angle C are not complementary (sum of 90).
4 0
3 years ago
The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.3 days and a standard de
inna [77]

Answer:

<em>The probability of spending between 4 and 7 days in recovery</em>

<em>P(4≤x≤7) = 0.5445</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given mean of the Population μ = 5.3 days

Given standard deviation of the population 'σ' = 2 days

Let 'X' be the random variable in normal distribution

Let    x₁ = 4

Z_{1} = \frac{x_{1}-mean }{S.D} = \frac{4-5.3}{2} = -0.65

Let    x₂ = 7

Z_{2} = \frac{x_{2}-mean }{S.D} = \frac{7-5.3}{2} = 0.85

<u><em>Step(ii):-</em></u>

<u><em>The probability of spending between 4 and 7 days in recovery</em></u>

<em>P(4≤x≤7) = P(-0.65≤Z≤0.85)</em>

<em>              =  P(Z≤0.85) - P(Z≤-0.65)</em>

<em>             = 0.5 + A( 0.85) - ( 0.5 - A(-0.65) </em>

<em>             = 0.5 + A( 0.85) -  0.5 +A(0.65)   ( ∵A(-0.65) = A(0.65)</em>

<em>            =   A(0.85) + A(0.65)</em>

<em>           = 0.3023 + 0.2422</em>

<em>          = 0.5445</em>

<u><em>Final answer:</em></u><em>-</em>

<em>The probability of spending between 4 and 7 days in recovery</em>

<em>P(4≤x≤7) = 0.5445</em>

<em>            </em>

6 0
3 years ago
Hello please help i’ll give brainliest
Rama09 [41]

Answer: 81

Step-by-step explanation: The median is the middle number in a sorted, ascending or descending, list of numbers and can be more descriptive of that data set than the average. Write all of the numbers and cross out a even amount of numbers on both sides. Image 1 shows your problem. If your problem had another number, you solve it differently. Check image 2.

6 0
3 years ago
8 X 3 =<br><br> (2x ___) + (___ x3)
just olya [345]

Step-by-step explanation:

.......................................................... (2×3)+(6×3)

4 0
3 years ago
Read 2 more answers
SUPER URGENT: Find cscθ.
sertanlavr [38]

Answer:

OPTION 2

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • There is a book that is 8 inches long, 5 inches wide, and 2 inches thick what is the volume of the book?
    7·1 answer
  • Which is the best example of a number written in scientific notation?
    6·2 answers
  • How wide is a poster that has a length of
    10·2 answers
  • Suppose you earned 8t-3 on monday and 6t+5 dollars on tuesday. what were your total earnings? simplify your answer
    14·1 answer
  • If f(x)=2x+5, then f(4) represents what
    15·1 answer
  • A car is driven on a straight track such that its displacement from the starting point is given as x = t + 2t2. What is the aver
    8·1 answer
  • Plz help me solve this
    8·1 answer
  • The temperature at a mountain base camp was −2 degrees Celsius on Thursday. Friday morning, the temperature was 1 degree Celsius
    11·2 answers
  • HELLPPPPPPPPPPPPPPPPPPPPPPPPP!!!!!!!!!!!!!! HELLPPPPPPPPPPPPPPPPPPPPPPPPP!!!!!!!!!!!!!! HELLPPPPPPPPPPPPPPPPPPPPPPPPP!!!!!!!!!!!
    14·1 answer
  • Which algebraic expression represents the phrase "the quotient of negative eight and the sum of a number and three"
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!