Please Help :( This is Combinations

Mathematics

1 answer:

alukav5142 [94]3 years ago

7 0

Answer:

Total way of selection is

250046000

Step-by-step explanation:

Total ways of selecting 5 seniors from 9 is 9c5

and Total ways of selecting 3 juniors from 7 is 7c3

ways of selecting 4 sopho from 8 is 8c4

ways of selecting 6 freshman from 10 is 10c6

now, total way of selection come to be

10c6 × 8c4 × 7c3 × 9c5

=210×70×35×126

=250047000

✌️:)

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Five students are seated in a circle. Each student has either a red disc or a green disc painted on

lesantik [10]

Answer:

Students 3 and 4 have green discs. Students 1, 2, and 5 have red discs.

Step-by-step explanation:

If Student 1 is telling the truth, Students 2 and 3 must be lying. If that were true, Student 1 would see at least 2 red discs, not 1. So Student 1 is lying, and therefore has a red disc.

Therefore, Student 5 is also lying, and must also have a red disc.

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3 years ago

Please help me with this question

BartSMP [9]

Answer:

$3x-28=2x+25\\x=53$

Step-by-step explanation:

Parallel lines cut by a transversal are two lines which do not cross intersected by a third line. Because lines such as m and n are parallel, we have angles which are equal to each other.

Corresponding Angles - angles located in the same position in each intersection. Can be shown by translating or sliding the angle down/up.
Alternate Interior Angles - angles located inside the parallel lines across the transversal. Can be shown by reflecting and translating or rotation.
Alternate Exterior Angles - angles located outside the parallel lines across the transversal. Can be shown by reflecting and translating or rotation.

Vertical angles - angles across a vertex from one another. Can be shown by reflection.

The angles shown here are located outside the parallel lines and across the transversal from each other. Therefore we have Alternate Exteroir angles and can set them equal to each other to solve for x.

$3x-28=2x+25\\3x-2x-28=2x-2x+25\\x-28=25\\x-28+28=25+28\\x=53$