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low-fuel landing


25%

instrument failure


15%

bad weather


5%

failed landing gear


15%

engine failure


20%

autopilot failure


15%

normal conditions


5%


At a flight-training academy, each pilot is given an emergency condition in a simulator during testing (the probabilities are shown in the table). In the current class, 25 trainees failed the test and 115 passed. How many trainees were tested in the most common scenario?

25

35

15

10

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Sagot :

The most common scenario was the low-fuel landing. It was there in 25 % of the tests. The number of tests was 25+115=140 tests (adding up the failed and passed test.

So to find our how many were trained in the most common scenario, we have to calculate25% of 140.

25/100*140=(i calculate frist 25/100. I divide both by 25, we have 1/4)
1/4*140 = In order to calculate this, we need to divide 140/4. This is:

  35
____
140:4
 12
   20
   20
   ==


so the correct answer is 35.
chanellealexander73

Answer: b is the right answer 35

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