How many ways can a president, vis-president and treasurer be selected from a group of 15 students?

Mathematics

1 answer:

dybincka [34]2 years ago

8 0

Answer:

455ways

Step-by-step explanation:

This is expressed as 15 C 3 ( C- combination)

The concept of combination is used when we talk about selection.

Now we are selecting 3 from a sample of 15

15 C 3 = 15! / (15-3)! 3! = 15 ×14×13×12!/12!×3×2

= 5 × 7 × 13 = 455ways

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Given the following information, determine which lines are parallel and what justifies them being parallel.

weeeeeb [17]

Answers:

Blank 1 = p and r

Blank 2 = corresponding angles converse

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Explanation:

Refer to the diagram below. I've marked lines p and r in red, and the angles 3 and 22 in blue. They are corresponding angles because they are both in the same southeast corner of their four-corner configuration.

If the corresponding angles are congruent, then the lines p and r are parallel by the aptly named corresponding angles converse

4 0

2 years ago

How many houses have an area less than 100 m² ?

dsp73

Answer:

This question overall depends on a continuously changing factor.

Step-by-step explanation:

There are many houses in this world that have an area of less than 100 $m^2$ , while many others have up to 700, 800, or even 1000 $m^2$ of land. Your question is impossible to calculate because of the massive amount of houses in this world. If you want a good estimate, say around 0.9 to 1.8 billion.