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Aloiza [94]
3 years ago
13

there are 20 students in the group , 15 from them are athletes. it is taken for competition 10 students. find the probability th

at 10 students are 5 athletes.​
Mathematics
1 answer:
Allisa [31]3 years ago
5 0

Answer:

Step-by-step explanation: The question is a bit unclear?

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A pizza restaurant starts the day with a certain amount of pizza dough. The length of time the dough will last varies inversely
nordsb [41]

Answer:

thats alot of people don't you think

Step-by-step explanation:

6 0
3 years ago
The flagpole at school casts a shadow that is 18 feet long. A student nearby is 5.5 feet tall and casts a shadow that is 3 feet
azamat

Answer:

33 feet.

Step-by-step explanation:

If the ratio of the student to their shadow and flagpole to its shadow are equal, then you can use the proportion

5.5/3 = x/18 and cross multiply to find x.

5.5 × 18 = 99

3 × x = 3x

3x/3 = x, 99/3 = 33.

x = 33.

5 0
3 years ago
Shiny White dental insurance costs $258 per year. Approximately one-third of insured people need a filling, which averages $110
sveta [45]

Answer:

  about $145.33

Step-by-step explanation:

Consider a group of 15 customers. They will pay ...

  15 × $258 = $3870

in premiums each year.

One-third of those, 5 customers, will submit claims for fillings, so will cost the insurance company ...

  5 × $110 = $550

And 80% of them, 12 customers, will submit claims for preventive check-ups, so will cost the company ...

  12 × $95 = $1140

The net income from these 15 customers will be ...

  $3870 -550 -1140 = $2180

Then the average income per customer is this value divided by the 15 customers in the group:

  $2180/15 = $145.33

_____

<em>Alternate solution</em>

Above, we chose a number of customers that made 1/3 of them and 4/5 of them be whole numbers. You can also work with one premium and the probability of a claim:

  258 - (1/3)·110 - 0.80·95 = 145.33

8 0
3 years ago
Read 2 more answers
Plot two points to graph the equation.<br><br> y=−1/3x+1
Viktor [21]

Answer:

(3,0) & (-6,3)

Step-by-step explanation:

-1/3(3)+1= -1+1=0

-1/3(-6)+1= 2+1= 3

8 0
3 years ago
Jasmine has taken an online boating safety course and is now completing her end of the course exam. As she answers each question
anzhelika [568]

Answer:

80 questions.

Step-by-step explanation:

If 20% = 16 Q,

then 100 ÷ 20 = 5

Therefore, 5 x 16 = 80 questions on the test.

8 0
3 years ago
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