2 years ago

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Mathematics

1 answer:

Black_prince [1.1K]2 years ago

7 0

Answer:

8(A.)

9(maybe D.)

(B.)

Step-by-step explanation:

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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.

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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2 years ago

At a football stadium, 4% of the fans in attendance were teenagers. If there were 120 teenagers at the football stadium, what wa

Law Incorporation [45]

1200 divided by 4%= 3000

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2 years ago

What is the answer 101/8+(35/8+27/8

suter [353]

Answer:

$\frac{163}{8}$

Step-by-step explanation:

The sum already has common denominators so there is no need to change the denominators. Just add the numerators.

$\frac{35}{8} + \frac{27}{8} = \frac{62}{8}$

$\frac{101}{8} + \frac{62}{8} = \frac{163}{8}$

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Step-by-step explanation:

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Write and evaluate the expression. Then, complete the statements.

Leni [432]

Answer:

The Answer is 5

Step-by-step explanation:

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30/t – 10

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