Takdir wrote:

why the answer is E?

You can look at the argument in math terms.

1950: 9 injuries on the slopes per 1000 skiers --> Off slopes injuries are 10% of injuries. So, 9 on slopes injuries per 1000 must be 90% of injuries.

Total injuries per 1000 1950: 9 on slopes + 1 off slopes = 10 total

1980: 3 injuries on the slopes per 1000 skiers --> Off slopes injuries are 25% of injuries. So, 3 on slopes injuries per 1000 must be 75% of injuries.

Total injures per 1000 1980: 3 on slopes + 1 off slopes = 4 total

Now let's look at the answer choices.

(A) As the number of ski injuries that occur on the

slopes decreases, the number of injuries that

occur on the premises of ski resorts increases.

No. The off slope number per 1000 did not change.

(B) The amount of alcohol consumed per skier

increased between 1950 and 1980.

There is no reason to believe this, especially as off slope injuries did not increase.

(C) The technology of ski boots and bindings

affects the incidence of each type of

ski-related injury.

Actually, off slope injuries did not change even after the introduction of the ski boots and bindings.

(D) If the technology of ski boots and bindings

continues to advance, the incidence of

ski-related injuries will continue to decline.

This seems likely, but the prompt does not actually indicate that this is the case. The prompt discusses what happened in the past without saying much that indicates what would happen in the future should the technology continue to advance.

(E) Injuries that occurred on the slopes of ski

resorts made up a smaller percentage of

ski-related injuries in 1980 than in 1950.

This is true. In 1950, on slopes injuries constituted 90% of injuries. In 1980, on slopes injuries constituted 75% of injuries.

The correct answer is E.

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