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4 years ago

In a class 4 by 5 of student are girls then find the number of boys

Mathematics

1 answer:

cricket20 [7]4 years ago

8 0

Step-by-step explanation:

Let the total number of boys be x.

We know that :-

$\frac{1}{1} = 1$

is the greatest fraction.

Now, considering the class AS whole, we can say that the value of class is 1.

According to Equation given:-

$\dfrac{4}{5} + x = 1$

$x = \dfrac{1}{1} - \dfrac{4}{5}$

Taking LCM,

$\dfrac{5 - 4}{5}$

$= \dfrac{1}{5}$

Fraction of the class are boys.

Hope it helps :D

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if a snail can travels 200 inches in 2 hours, in 2 hours how long will it take the snail to travel 50 inches

Veronika [31]

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3 years ago

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The value of a boat is $23,400. It loses 8% of its value every year. Find the approximate monthly percent decrease in value. Rou

Oduvanchick [21]

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3 years ago

Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a rand

SOVA2 [1]

Answer:

Question 1:

(a) P(x<60) = 0.9236

(b) P(x>16) = 0.9564

(c) P(16<x<60) = 0.88

(d) P (x>60) = 0.0764

Question 2:

(a) P(x<3) = 0.0668

(b) P(x>7) = 0.0062

(c) P(3<x<7) = 0.927

Step-by-step explanation:

Question 1:

x = no. of mg of porphyrin per deciliter of blood.

μ = 40

σ = 14

(a) We need to compute P(x<60). We need to find the z-score using the normal distribution formula:

z = (x - μ)/σ

P(x<60) = P((x - μ)/σ < (60 - 40)/14)

= P(z < 20/14)

= P(z<1.43)

Using the normal distribution probability table we can find the value of p at z=1.43.

P(z<1.43) = 0.9236

so, P(x<60) = 0.9236

(b) P(x>16) = P(z>(16-40)/14)

= P(z>-1.71)

= 1 - P(z<-1.71)

= 1 - 0.0436

P(x>16) = 0.9564

(c) P(16<x<60) = P((16-40)/14) < x < (60-40)/14)

= P(-1.71 < z < 1.43)

This probability can be calculated as: P(z<1.43) - P(z<-1.71)

P(16<x<60) = 0.9236 - 0.0436

P(16<x<60) = 0.88

(d) P(x>60) = 1 - P(x<60)

we have calculated P(x<60) in part (a) so,

P(x>60) = 1 - 0.9236

P (x>60) = 0.0764

Question 2:

μ = 4.5 mm

σ = 1.0 mm

In this question, we will again compute the z-scores and then find the probability from the normal distribution table.

(a) P(x<3) = P(z<(3-4.5)/1)

= P(z<-1.5)

P(x<3) = 0.0668

(b) P(x>7) = 1 - P(x<7)

= 1 - P(z<(7-4.5)/1)

= 1 - P(z<2.5)

= 1 - 0.9938

P(x>7) = 0.0062

(c) P(3<x<7) = P(x<7) - P(x<3)

we have computed both of these probabilities in parts (a) and (b) so,

P(3<x<7) = 0.9938 - 0.0668

P(3<x<7) = 0.927

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3 years ago

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Ronch [10]

The line is right in the middle of 100 and 110 degrees so the answer should be 105 degrees. This tool is called a protractor. :)

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3 years ago

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kykrilka [37]

Answer:

27 feet.

Step-by-step explanation:

Graph the quadratic equation, then find the point on the graph which aligns with x=3. Y would equal 27.

8 0

2 years ago

In a class 4 by 5 of student are girls then find the number of boys​

In a class 4 by 5 of student are girls then find the number of boys