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October 20, 2014

October 20, 2014

Posted by **Anna** on Tuesday, January 5, 2010 at 4:27pm.

School A:

*Students who took the bus = 400

* Students who did not take the bus = 150

Total = 550

School B:

*Students who took the bus = 200

* Students who did not take the bus = 100

Total = 300

School C:

*Students who took the bus = 600

* Students who did not take the bus = 250

Total = 850

Calculate the probability that a randomly chosen student from this group of 850 students takes the bus and is from school A.

- probability -
**economyst**, Wednesday, January 6, 2010 at 9:10amHow bout "from this group of 550+300+850=1700 students"??

Assumeing that you meant 1700 students, there are 400 from School A that took the bus. Ergo, P=400/1700 = 23.5%

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