70% of citizens travel to work by tram, 85% by bus, while 65% of citizens use...

70% of citizens travel to work by tram, 85% by bus, while 65% of citizens use both ways of transport.

a) Find the probability that the randomly chosen citizen use at least one of those transport ways to travel to work?

b) The City transportation company officials surveyed all passengers that travel to work by bus. They asked if they also used a tram to travel to work. What percentage of affirmative responses received?

c) Are the events „The citizen travels to work by tram“ and „The citizen travels to work by bus“ independent?

Expert Solution

orchestra answered 2 years ago

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