Caroline Has Just Learned That She Needs to Be in Washington

Caroline has just learned that she needs to be in Washington DC the next morning for an urgent work related matter. She calls United, Delta and American. The early morning flights are all pretty full. Caroline finds out that there is a 25% chance that she can get on a United flight; 20% chance that she can get on Delta and 30% chance that she can get on American. What is the approximate probability that Caroline will be able to get on a plane to Washington DC?

A) 58%.
B) 65%.
C) 42%.
D) 48%.