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May 7, 2015

Homework Help: probability

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

A survey of 850 students conducted in two schools showed the following results:

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.

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