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How to answer this problem solving question: Anita and Terry ride the subway on sundays to visit their grandparents. There are 2 enterances to the subway from the street, north and south. Inside each entrance is an escalator, elevator and stairway leading to the first level. On the first level there are eight gates. At each end of thr first level (north and south) there is an escalator, elavator, and a stairway. These lead directly to the trains. How many different ways can Anita and Terry go frim street level to the trains?
We know that they have: 2 entrences 3 ways to chose (escalator,elevator and stairs) 8 gates and again 3 ways to chose (escalator, elevator and stairway)
now you have to multiply it: [tex]2*3*8*3=6*8*3=48*3=144[/tex]
There are 144 different ways that Anita and Terry can go from street level to the trains:)
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