Math Homework

# Fda bag contains five batteries, all of which are the same…

Customer Question
Fda bag contains five...

Fda bag contains five batteries, all of which are the same size and are equally likley to be selected. each battery is a diffrent brand. if you select four batteries at random, use the counting principle to determine how many points will be in the sample space if the batteries are selected

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Submitted: 23 days ago.Category: Math Homework
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3/30/2018
Math Tutor or Teacher: Brad Summers,
replied 23 days ago
Category: Math Homework
Satisfied Customers: 18
Experience: Mathematics Teacher at Baldivis Secondary College
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Hi, here is the solution:

The 1st battery can be selected in 5 ways

The 2nd in 4 ways

the 3rd in 3 ways

the 4th in 2 ways

Using the counting principle we have a total of 5*4*3*2 = 120 points in the sample space

Thanks

Customer reply replied 23 days ago
Math Tutor or Teacher: Brad Summers,
replied 23 days ago

So answer 120 is wrong ?

Math Tutor or Teacher: Brad Summers,
replied 23 days ago

Since the exercise says to use counting principle i think the order is important and the answer is 120

But if you say that 120 is wrong maybe the right result (if order is not important) is 5C4 = 5

Let me know....

Thanks

Category: Math Homework
Satisfied Customers: 18
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Experience: Mathematics Teacher at Baldivis Secondary College

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