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2 years ago

Can someone help me? Please.

Mathematics

1 answer:

Yuki888 [10]2 years ago

6 0

Answer:

Step-by-step explanation:

plot five points of f(x)=(1/2)^x

f(0)=(1/2)^0=1

f(1)=(1/2)^1=1/2... through five gives you

y=1, 1/2, 1/4, 1/8, 1/16 for points

(0, 1),(1, 0.5),(2, 0.25),(3, 0.125),(4, 0.0625)

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3 years ago

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

andre [41]

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

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.

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

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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:

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