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marshall27 [118]
3 years ago
5

Thirty equally spaced points on the circumference of a circle are labelled in order with the

Mathematics
1 answer:
blsea [12.9K]3 years ago
3 0

Answer:

22 is diametrically opposite of 7

Step-by-step explanation:

A circle has a total of 360º

The circumference of the circle has 12 equally spaced points

Each point on the circumference=360°/30

= 12º per point

A point (n) opposite to 7 on the circumference will form 180° line on the circle, that is half of the circle.

Half of the circle=30 points/2

=15 points

Therefore,

15+7=22

22 is diametrically opposite 7

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Answer:

120 ways

Step-by-step explanation:

Here, we want to calculate the number of ways in which the ribbons can be awarded.

There are 6 competitors and there should only be one first position. What this means is that there are 6 possible ways to become first and 6 possible ways to clinch the gold ribbon.

Now, looking at the second position, since one person already claimed the first, there would be only 5 of the competitors jostling for the second position. This means that the number of ways they can claim the blue ribbon is 5 ways

For the fourth position, there are only 4 competitors wanting to claim the red ribbon. This is because we already have winners for the first and second position.

The number of ways this can be done is thus 4 ways

Now the total number of ways the ribbons can be awarded would be 6 * 5 * 4 = 120 ways

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