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3 years ago

8

Rachel must store a few pieces of her furniture for six months. A storage unit costs $55 for the first month and $47.50 for the

remaining months. How much will it cost to store her furniture?

1 answer:

shepuryov [24]3 years ago

7 0

y=$47.50(5)+$55

y=$237.50+$55

y=$292.55

y=total

m(47.50+ amount increased by after the starting $55

b=$55; the start.

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3 years ago

Read 2 more answers

If you flip a fair coin 7 times, what is the probability that you will get exactly 4 tails?

andre [41]

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Step-by-step explanation:

We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.

This is the combination question.

The total combinations will be: 2^7=128

Now, finding number of ways we can get exactly 4 tiles:

We will use the formula:

$^nC_k=\frac{n!}{k!(n-k)!}$

in our given question, n= 7, k= 4

Putting values:

$^nC_k=\frac{n!}{k!(n-k)!}\\^7C_4=\frac{7!}{4!*3!}\\ ^7C_4=\frac{7*6*5*4!}{4!*3!}\\ ^7C_4=\frac{7*6*5}{6}\\ ^7C_4=35$

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Keywords: Probability

Learn more about Probability at:

#learnwithBrainly

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