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2 years ago

What is the probability that a phone number generated using the digits 1, 2, 2, 4, 5, 5, 6, and 2 is the number 654-5222

Mathematics

1 answer:

pochemuha2 years ago

7 0

Answer:

336 ways

Step-by-step explanation:

The digits are 1, 2, 2, 4, 5, 5, 6, and 2 that is total eight digits.

The number 654-5222 contains 7 digits.

So, we have find The number of permutations for choosing 7 digits from 8 digits given above.

This can be done in following ways

$\frac{8!}{3!\times2!}$ = $\frac{40320}{6\times2}$

= 336 ways

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Confidence interval is given by :-

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Then, the 99% confidence interval will be :-

$0.52\pm (2.576)\times(0.024)\\\\=0.52\pm0.061824\\\\=(0.52-0.061824,\ 0.52+0.061824)\\\= (0.458176,\ 0.581824)$

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