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umka2103 [35]
3 years ago
13

Please help and show step by step

Mathematics
2 answers:
kenny6666 [7]3 years ago
6 0
1. Find 70% of 100. 100 x 0.70 = 70.
2. Find 60% of 70. 70 x 0.60 = 42.
3. The answer is 42. Hope that helps!
Olegator [25]3 years ago
5 0

Answer:

75 students

Step-by-step explanation:

(70% Students)

(100 Students Left)

----

x = number of students left

\frac{70-x}{100-x} = .6

------

multiply by (100-x)

70 - x = .6 (100 - x)

70 - x = 60 - .6x

70 - 60 = x - .6x

10 = .4x

x = 10/.4

x = 25

Then, you subtract 25 from 100.

100-25 = 75 students

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8 men and 6 women arrive separately in a random fashion to a meeting. What is the probability that the first 4 people to show up
Vedmedyk [2.9K]
Ok, so here:
Remember for basic probability, you have to do: Probability=Events/Possible outcomes. For multiple events, you have to multiply all together.

The probability the first guy that shows up will be 8/14, because out of the 14 people, 8 of them are men. This however isn't your answer, note the question says "Separately"
The probability the second person that comes in is a dude is 7/13, because you have the first guy already in, and only 13 left.
The third person to come in being a dude has a probability of 6/12
The fourth person to come in being a dude has a probability of 5/11

When you have multiple events, the way to solve probability is to find the chances of each as a fraction, then multiply them together.

8/14 * 7/13 * 6/12 * 5/11=1680/24024
1680/24024=168/168 (168 goes into both)
Your final answer is 10/143
~Hope this helps!
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4 years ago
A department store buys a necklace for $65 and uses a markup rate of 45%. whats the selling price?
Veronika [31]
Multiply 65 by .45 which is 29.25, and you add it to 65 since it says “markup” in the problem. So the answer is $94.25
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3 years ago
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Answer: D

Step-by-step explanation:

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Step-by-step explanation:

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