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netineya [11]
3 years ago
5

1. Mr. Santos teaches 120 students. Sixty percent of his students earned an

Mathematics
2 answers:
nirvana33 [79]3 years ago
8 0

Answer:

72 students

Step-by-step explanation:

Dmitrij [34]3 years ago
3 0

Answer:

72

Step-by-step explanation:

because if you multiply 120 by 60% also 0.6, then you will get 72.

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Assume that there are 56 students in this class. what is the probability that at least two students share a? birthday
navik [9.2K]

P(at least 2 students have the same birthday)= 1- P(no 2 students have the same birthday)

Because P(A)=1-P(A'), where A is an event, and A' the complement of that event.

P(no 2 students have the same birthday)=

\frac{365}{365}* \frac{364}{365}*\frac{363}{365}*\frac{362}{365}*... \frac{310}{365}

think of the problem as follows. We have an urn of balls, numbered from 1 to 365 (the number of the days of the year. 

What is the probability of picking 56 different numbered balls, with replacements?

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the second any of 364 (since one selection has already been made)

the third any of the 363
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and so on

the 56th selection is one of 310 left


Answer: 

\frac{365}{365}* \frac{364}{365}*\frac{363}{365}*\frac{362}{365}*... \frac{310}{365}


4 0
3 years ago
What is the percent of change from<br> 82 to 67?
kramer

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-18.29

Step-by-step explanation:

5 0
3 years ago
The points (2,-5) and (5,r) lie on a line with slope 2. Find the missing coordinate r.
Andrew [12]

Answer: r = 1

Step-by-step explanation:

The slope of a line can be represented as \frac{y_2-y_1}{x_2-x_1}.  Plugging in the following values would provide you with:

\frac{(r)-(-5)}{(5)-(2)} =2

\frac{r + 5}{3}  = 2

r + 5 = 6

r = 1

Hope it helps :) and let me know if you want me to elaborate on anything.

7 0
2 years ago
Please answer my question below<br> Will give you a brainliest?
VARVARA [1.3K]

Answer:

1: 3\sqrt2 - \sqrt14

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4: 2\sqrt5 - \sqrt10

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I already gave you these answers man

Step-by-step explanation:

7 0
4 years ago
Miss turns fifth-grade class her big sales on Tuesday and Thursday during lunch to raise money to buy science equipment for the
OLEGan [10]

the awer to thst is $25.55

6 0
3 years ago
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