Multiple choice

Directions: A certain city is served by subway lines A,B and C and numbers 1 2 and 3 When it snows , morning service on B is delayed When it rains or snows , service on A, 2 and 3 are delayed both in the morning and afternoon When temp. falls below 30 degrees Fahrenheit afternoon service is cancelled in either the A line or the 3 line, but not both. When the temperature rises over 90 degrees Fahrenheit, the afternoon service is cancelled in either the line C or the 3 line but not both. When the service on the A line is delayed or cancelled, service on the C line which connects the A line, is delayed. When service on the 3 line is cancelled, service on the B line which connects the 3 line is delayed On Aug 15th with the temperature at 97 degrees Fahrenheit it begins to rain at 1 PM. What is the minimum number of lines on which service will be affected?

  1. 2

  2. 3

  3. 4

  4. 5
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

On Aug 15, temperature 97°F (above 90°F), rain at 1 PM (afternoon): Rain/snow causes delays on A, 2, 3 in afternoon. Above 90°F causes afternoon cancellation on either C or 3. To minimize affected lines, cancel C afternoon. A is delayed (causing C to also be delayed), 2 and 3 are delayed. This affects 4 lines: A, 2, 3, C. If 3 were cancelled instead, B would also be delayed (5 lines affected).

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