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3 years ago

Find out the Range coefficient of the range

Mathematics

1 answer:

Alex777 [14]3 years ago

7 0

Answer:

0.4494

Step-by-step explanation:

Given :

marks number of students

20-29 8

30-39 12

40-49 20

50-59 7

60-69 3

The range Coefficient is obtained thus :

Range Coefficient = (Xm - Xl) / (Xm + Xl)

Where ;

Xm = Mid value of highest class = (60+69)/2 = 64.5

Xl = Mid value of lowest class = (20+29)/2 = 24.5

Range Coefficient = (64.5 - 24.5) / (64.5 + 24.5)

Range Coefficient = 40 / 89 = 0.4494

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Last year, Jasleen was 150 cm tall. This year, her doctor measures her height and tells her that she has grown 20%. How many cen

Anastasy [175]

Answer:

30cm

Step-by-step explanation:

150*0.2=30cm, 20% of 150 is 30cm.

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3 years ago

John is selling tickets to an event. Attendees can either buy a general admission ticket, x,

Masteriza [31]

John sold 18 general admission tickets and 11 VIP tickets.

Step-by-step explanation:

Given,

Cost of each general admission = $50

Cost of each VIP ticket = $55

Total tickets sold = 29

Total revenue generated = $1505

Let,

x represent the number of general admission tickets sold

y represent the number of VIP tickets.

x+y=29 Eqn 1

50x+55y=1505 Eqn 2

Multiplying Eqn 1 by 50

$50(x+y=29)\\50x+50y=1450\ \ \ Eqn\ 3$

Subtracting Eqn 3 from Eqn 2

$(50x+55y)-(50x+50y)=1505-1450\\50x+55y-50x-50y=55\\5y=55$

Dividing both sides by 5

$\frac{5y}{5}=\frac{55}{5}\\y=11$

Putting y=11 in Eqn 1

$x+11=29\\x=19-11\\x=18$

John sold 18 general admission tickets and 11 VIP tickets.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

5 0

3 years ago

The table shows the price of apples in the local market. What is the cost of 12 pounds of apples? Apples (pounds) Price (dollars

MAXImum [283]

Lbs : 4, 8, 12, 16
cost : 6, 12, ?, 24

12 lbs would cost u $ 18 because the apples cost (6/4) = 1.50 per lb

5 0

3 years ago

Read 2 more answers

at an aquarium six out of 18 deliveries are plants out of 15 delivery's in one week how manybare plants

earnstyle [38]

Do six multiply fifteen which equals to 90

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3 years ago

The price in dollars of a stereo system is given by p(q) = (1000/q2)+1000 where q represents the demand of the product.

elena-14-01-66 [18.8K]

Answer:

a) r(q) = 1000(q +1/q)

b) r'(q) = 1000(1 -1/q^2)

c) r'(10) = 990

Step-by-step explanation:

a) Revenue is the product of quantity and price:

r(q) = q·p(q) = q(1000(1 +1/q^2))

r(q) = 1000(q + 1/q)

b) The derivative is ...

r'(q) = 1000(1 -1/q^2)

c) The derivative evaluated for q=10 is ...

r'(10) = 1000(1 -1/10^2) = 1000(0.99)

r'(10) = 990

5 0

3 years ago