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3 years ago

8

If 35 student are in student council, and 60% are boys. How many girls are in student council?

1 answer:

SSSSS [86.1K]3 years ago

4 0

40% are girls or more accurate would be 14

Solution:

What is 40% of 35?

Y is 40% of 35

Equation: Y = P% * X

Solving our equation for Y

Y = P% * X

Y = 40% * 35

Converting percent to decimal:

p = 40%/100 = 0.4

Y = 0.4 * 35

Y = 14

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Move the -5 over by adding 5 to both sides
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3 years ago

12. What percent of 60 is 12? Show your work.

lora16 [44]

12 is 20% of 60 because 12/60 = 0.2.

6 0

3 years ago

Read 2 more answers

A total of 600 advertisements were sold for a certain magazine. If 30 percent of the first 200 sold were in color, 20 percent of

solong [7]

Answer:

%35 of them were in color

Step-by-step explanation:

Since 30 percent of the first 200 sold were in color, 200x30/100 = 60 of them were in color.

Since 20 percent of the next 300 sold were in color, 300x20/100 = 60 of them were in color.

Since 90 percent of the last 100 sold were in color, 100x90/100 = 90 of them were in color.

In total, 60 + 60 + 90 = 210 out of 600 were in color.

The percentage is: $\frac{600}{100}$ = $\frac{210}{x}$ → x = $\frac{21000}{600}$ = 35

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3 years ago

Inquiries arrive at a record message device according to a Poisson process of rate 15 inquiries per minute. The probability that

zloy xaker [14]

Answer:

0.0498 = 4.98%

Step-by-step explanation:

In a Poisson distribution, the probability that X represents the number of successes of a random variable is given by the following formula:

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

In which

x is the number of sucesses

e = 2.71828 is the Euler number

$\mu$ is the mean in the given time interval.

Inquiries arrive at a record message device according to a Poisson process of rate 15 inquiries per minute.

Each minute has 60 seconds.

So a rate of 1 inquire each 4 seconds.

The probability that it takes more than 12 seconds for the first inquiry to arrive is approximately

Mean of 1 inquire each 4 seconds, so for 12 seconds $\mu = \frac{12}{4} = 3$

This probability is P(X = 0).

$P(X = x) = \frac{e^{-\mu}*\mu^{x}}{(x)!}$

$P(X = 0) = \frac{e^{-3}*3^{0}}{(0)!} = 0.0498$

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3 years ago

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Answer:

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Step-by-step explanation:

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