Probability and Patterns in Bug Movement

The video tutorial explores the probability of a bug returning to its starting vertex on the tenth move in an equilateral triangle. The bug randomly moves to one of the two other vertices on each move. The tutorial calculates the probability for each move, identifies patterns, and generalizes the probability pattern to solve the problem. The final solution is verified, showing that the probability is 171/512, with m + n equaling 683.

What is the initial setup of the problem involving the bug and the triangle?

• A bug moves randomly between the vertices of a hexagon.

• A bug moves randomly between the vertices of a pentagon.

• A bug moves randomly between the vertices of an equilateral triangle.

• A bug moves randomly between the vertices of a square.

What is the probability of the bug moving to vertex B on its first move?

• 1/3

• 1/4

• 1

• 1/2

How is the probability of the bug being at vertex A on the second move calculated?

• By multiplying the probabilities of being at B and C.

• By subtracting the probabilities of being at B and C.

• By adding the probabilities of being at B and C.

• By averaging the probabilities of being at B and C.

What pattern is observed in the probabilities as the moves progress?

• The probabilities form a geometric sequence.

• The probabilities remain constant.

• The probabilities form an arithmetic sequence.

• The probabilities alternate between two values.

What is the denominator of the probability fraction for the bug being at vertex A on the tenth move?

• 128

• 1024

• 512

• 256

Tags

CCSS.7.SP.A.2

How is the numerator of the probability fraction for the tenth move determined?

• By dividing the numerator of the previous move by 2.

• By subtracting the numerator of the previous move from the one before it.

• By adding the numerators of the previous two moves.

• By multiplying the numerator of the previous move by 2 and adding the one before it.

What is the final probability of the bug returning to the starting vertex on the tenth move?

• 85/256

• 85/512

• 171/512

• 171/256

What is the sum of m and n in the probability fraction m/n for the tenth move?

• 683

• 171

• 703

• 512

What is the pattern used to verify the probability calculation?

• The pattern of using powers of two in the denominators.

• The pattern of adding the probabilities of all vertices.

• The pattern of averaging the probabilities of all vertices.

• The pattern of multiplying the probabilities of all vertices.

Tags

CCSS.7.SP.C.6

What is the significance of the pattern verification in the conclusion?

• It suggests a different approach to the problem.

• It validates the derived formula and final answer.

• It shows the probability calculation is unnecessary.

• It confirms the probability calculation is incorrect.

Tags

CCSS.7.SP.C.6