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
Vinil7 [7]
3 years ago
10

The table shows the year groups of some students who use the canteen. Mr Ford wants to survey 50 of these students stratified by

year group. How many more year 9 students than year 8 students should be in the survey?

Mathematics
2 answers:
igor_vitrenko [27]3 years ago
6 0

7 more year 9 students than year 8 students should be surveyed, If Mr.Ford wants to survey 50 of these students stratified by year group.

Step-by-step explanation:

The given is,

                    Year                        Students

                       7                                 80

                       8                                 110

                       9                                 160

                    Total                              350

           Mr.Ford wants to survey 50 of these students stratified by year group.

Step:1

           Formula to find the ratio of number of grouped students to total students,

                           Ratio, r = \frac{Number of students grouped }{Total number of students}

                                         = \frac{50}{350}

                                         = 0.1428

Step:2

          Formula for Number of students surveyed from year wise,

          For year 7 students,

                                         = (Ratio) × (Students from year 7)

                                         = 0.1428 × 80

                                         = 11.424

                                        ≅ 11               (∵ For students we convert into whole number)

         For year 8 students,

                                         = (Ratio) × (Students from year 8 )

                                         = 0.1428 × 110

                                         = 15.708

                                        ≅ 16               (∵ For students we convert into whole number)

          For year 8 students,

                                         = (Ratio) × (Students from year 9 )

                                         = 0.1428 × 160

                                         = 22.8

                                        ≅ 23             (∵ For students we convert into whole number)

Step:3

          To find How many more year 9 students than year 8 students should be in the survey

                                        = ( Students from year 8 for group) -

                                                                     ( Students from year 8 for group)

                                        = 23 - 16

                                        = 7 students

Result:

          7 more year 9 students than year 8 students should be surveyed, If Mr.Ford wants to survey 50 of these students stratified by year group.

n200080 [17]3 years ago
5 0

Answer:

7

Step-by-step explanation:

You might be interested in
I have a question here. ​
taurus [48]

9514 1404 393

Answer:

  P(F|A) = 35%

Step-by-step explanation:

P(F|A) = P(F&A)/P(A) = 7%/20% = 0.35

P(F|A) = 35%

_____

The given numbers will let you fill in a table for all of the categories of workers. However, it turns out this question can be answered using only the numbers given in the problem statement.

6 0
2 years ago
PLZ HELP MEEEEE!!!! ILL GIVE YOU BRAINLY!!
valkas [14]

Answer:

Step-by-step explanation: -13, 9

8 0
2 years ago
Brand A scooter has a top speed that goes 4 miles per hour faster than Brand B. If after 5 hours, Brand A scooter traveled 75 mi
Travka [436]

Answer:

11MPH

Step-by-step explanation:

I DIVIDED 75 AND 5 =11  HOPE THIS HELP

5 0
3 years ago
How much is 2/3 of two dozen?
Naddika [18.5K]

Answer:

16

Step-by-step explanation:

2 dozen= 24

24/3 = 8

8×2=16

7 0
3 years ago
Read 2 more answers
Darby bought a rare baseball card for $2,000. Three years later, the value of the card had increased 35% of its original value.
kari74 [83]
<h3>Answer: 700 dollars</h3>

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

Work Shown:

35% = 35/100 = 0.35

35% of 2000 = 0.35*2000 = 700

Since the card increased by 700 dollars, this means the card is now worth 2000+700 = 2700 dollars.

4 0
3 years ago
Other questions:
  • Rodney bought a 25-pound bag of dog food. His dog ate 10 2/5 pounds of the food in the first month and 10 4/5 pounds in the seco
    10·2 answers
  • How do you convert 0.45 (45 being repeated) to a fraction?
    7·2 answers
  • Is the ratio 2.5:3.5 proportional to the ratio 12:5
    10·1 answer
  • Use the recursive formula to answer the question.
    10·1 answer
  • How many times larger is the value of<br> 86,000,000 than 8,600?
    10·2 answers
  • 15x-3y=96 in slope intercept form
    8·2 answers
  • Karen has calls has 500 or 900 yards of thick soft wool, she has 200 feet at the strore they have 500 feet of wool. How many bal
    13·1 answer
  • HELP FAST PLS !!!!
    11·2 answers
  • 2.8 -3x =12.1 −6x what's x
    15·2 answers
  • 2. Karen was cutting out some fabric
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!