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DanielleElmas [232]
3 years ago
13

Alice invests $8000 in two certificates of deposit; the interest on the first certificate is 2%, and the interest on the second

is 3%. Let's denote the amount she invests in the first certificate by x. Then the amount she invests in the second certificate is _________  . The interest she receives on the first certificate is __________ , and the interest she receives on the second certificate is ______________ . So a function that models the total interest she receives from both certificates is y =___________ .
Mathematics
1 answer:
Nataliya [291]3 years ago
7 0
1. 8000-x (You invest x in the first, then you have 8000-x more to make up for)
2. 0.02x (Interest * how much you invested)
3. 0.03(8000-x) (Interest * how much you invested)
4. 0.02x+240-0.03x
=240-0.01x
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The probability of choosing a number that is not a multiple of 2 is P = 0.44

<h3 /><h3>How to find the probability?</h3>

We need to count the number of options for each digit.

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The total number of combinations is the product between the numbers of options:

C = 8*9*9 = 648

If we want our number to not be a multiple of 2 then it must end in a odd digit, the combinations that meet that condition are:

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C = 8*9*4 = 288

Then the probability of selecting a 3 digit number that is not a multiple of 2 is:

P = 288/648 = 0.44

If you want to learn more about probability, you can read:

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