Exhibit 20

question 75

Multiple Choice

Exhibit 20.12.A magician has a coin that may or not be fair.The results of 30 flips of the coin are: H H T H T H H T H H T H H T H T H H H T T T T T H H H H H T. Refer to Exhibit 20.12.For the Wald-Wolfowitz runs test,the value of R is:

• A)8
• B)11
• C)16
• D)19

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Definitions:

Power Divider

A mechanical device in vehicles, particularly in heavy-duty trucks, that splits the driving force between the front and rear axles to improve traction.

Interaxle Differential

A mechanism that allows for differential speeds between the front and rear axles of a multi-axle vehicle, improving maneuverability and traction.

Controlled Traction

Differential gearing that uses a friction plate assembly to transfer drive torque from a slipping wheel (sensed by axle shaft spinout) to its opposite.

Tag Axle

A truck dead axle located behind a drive axle; may or may not be a lift axle.