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3 years ago

In a class, 14 out of the 35 students are girls. What percentage of the class is girls

Mathematics

2 answers:

Katen [24]3 years ago

8 0

Answer:

40%

Step-by-step explanation:

If you have 14 girls and the whole class is 35 students in number, you can put that in fraction form (14/35) then just convert the fraction to a decimal to get 0.4 or 40%

geniusboy [140]3 years ago

6 0

Answer:

I believe it is 40%

Step-by-step explanation:

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Song suggestions ? any songs

SIZIF [17.4K]

Answer:

Unforgettable and Chanaynay by wewantwraiths

Step-by-step explanation:

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3 years ago

Read 2 more answers

A construction company is considering submitting bids for contracts of three different projects. The company estimates that it h

julsineya [31]

Answer:

a. $P(x)=\frac{n!}{x!(n-x)!}*p^{x}*(1-p)^{n-x}\\$

b. $E(x) = 0.3$

c. $S(x)=0.5196$

d. $E=5,000$

Step-by-step explanation:

The probability that the company won x bids follows a binomial distribution because we have n identical and independent experiments with a probability p of success and (1-p) of fail.

So, the PMF of X is equal to:

$P(x)=\frac{n!}{x!(n-x)!}*p^{x}*(1-p)^{n-x}\\$

Where p is 0.1 and it is the chance of winning. Additionally, n is 3 and it is the number of bids. So the PMF of X is:

$P(x)=\frac{3!}{x!(3-x)!}*0.1^{x}*(1-0.1)^{n-x}\\$

For binomial distribution:

$E(x)=np\\S(x)=\sqrt{np(1-p)}$

Therefore, the company can expect to win 0.3 bids and it is calculated as:

$E(x) = np = 3*0.1 = 0.3$

Additionally, the standard deviation of the number of bids won is:

$S(x)=\sqrt{np(1-p)}=\sqrt{3(0.1)(1-0.1)}=0.5196$

Finally, the probability to won 1, 2 or 3 bids is equal to:

$P(1)=\frac{3!}{1!(3-1)!}*0.1^{1}*(1-0.1)^{3-1}=0.243\\P(2)=\frac{3!}{2!(3-2)!}*0.1^{2}*(1-0.1)^{3-2}=0.027\\P(3)=\frac{3!}{3!(3-3)!}*0.1^{3}*(1-0.1)^{3-3}=0.001$

So, the expected profit for the company is equal to:

$E=-10,000+50,000(0.243)+100,000(0.027)+150,000(0.001)\\E=5,000$

Because there is a probability of 0.243 to win one bid and it will produce 50,000 of income, there is a probability of 0.027 to win 2 bids and it will produce 100,000 of income and there is a probability of 0.001 to win 3 bids and it will produce 150,000 of income.

5 0

3 years ago

Exit Ticket: At noon, a tank has a water depth of 9 in. After 3 hours, the depth was 8 inches. At 6pm, the depth was 7 inches. W

OLEGan [10]

Answer:

Step-by-step explanation:

The straight line equation is:

y = m*x + b Where m is the slope of the line and b the intercept with y-axis, in our case y is the depth of the tank and x (time in lapsus of 3 hours).

The slope m = ( y₂ - y₁ ) / (x₂ - x₁)

We have point A ( 3 , 8 ) and point B ( 6 , 7 )

m = ( 6 - 3 ) / (7 - 8 ) m = -3

We see that each 3 hours time-depth decreases 1 in.

Then to find the depth at the beginning of x-axis

At noon 12 tank was 9 inches, three hours before at 9 in the morning the depth was 10 inches and:

9 in the morning 10

6 in the morning 11

3 in the midnight 12

12 in the night 13

Then 13 is the intercept with y-axis

then the equation is:

h = - 3*x + 13

Note x is time in lapsus of 3 hours

4 0

2 years ago

Distance between a(3,9) b(-10,4)

stira [4]

Answer:

√194 i think

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Is -5/6 Real, Rational, Irrational, Integer, Whole, or real number?

kati45 [8]

Answer:

Rational

Step-by-step explanation:

Rational number consists of

Whole Numbers
Natural Numbers
Integers
Negative Numbers
Fractions
Decimals

-5/6 is a Fraction and we can also simply it to a Decimal.

Hope this helps ;) ❤❤❤

5 0

3 years ago