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Ostrovityanka [42]
3 years ago
5

A local grocery store tested spinach samples for E coli bacteria using two different tests. The first test has a 94% probability

of giving accurate results, while the second test is accurate 89% of the time. A sample that contains E coli bacteria is tested.
The probability that both tests detect the bacteria is _%
Mathematics
2 answers:
Afina-wow [57]3 years ago
6 0

Answer:  Probability that both tests detect the bacteria is 83.66%.

Step-by-step explanation:

Since we have given that

Probability of  the first test giving accurate results = 84%

Probability of the second test is accurate = 89%

Probability of both tests detect the bacteria is given by

\frac{94}{100}\times \frac{89}{100}\\\\=0.94\times 0.89\\\\=0.8366\\\\=83.66\%

Hence, Probability that both tests detect the bacteria is 83.66%.

3241004551 [841]3 years ago
5 0
The results of the tests are independent. Therefore the probability that both tests detect the bacteria is:
0.94\times0.89=0.8366
As a percentage we could say 83.66%
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What is the ratio for consonants to vowels,Vowels to total letters,and all letters to consonants
Studentka2010 [4]

Answers:

  • Ratio of consonants to vowels = 21:5
  • Ratio of vowels to total letters = 5:26
  • Ratio of all letters to consonants = 26:21

================================================

Explanation:

vowels = {a, e, i, o, u}

consonants = anything but a vowel (eg: the letter R)

There are 26 letters in the English alphabet. Five of which are vowels, so there are 26-5 = 21 consonants.

The ratio of consonants to vowels is 21:5

The <u>order is important</u> because the number of consonants must be listed first, simply because "consonants" is mentioned first in the phrasing "ratio of consonants to vowels". In other words, writing 5:21 would mean the ratio of vowels to consonants.

The ratio 21:5 cannot be reduced further since 21 and 5 have no factors in common (other than 1).

------------------------------

The other ratios will follow a similar idea as mentioned in the previous section.

To get the ratio of vowels to total letters, we list the number of vowels first (5) follow by the number of letters (26). A colon separates the two numbers to form the ratio 5:26

This ratio cannot be reduced further.

-------------------------------

Like in the previous sections, we'll glue together two numbers to form a ratio. In this case, we have 26 letters glued with 21 consonants to form the ratio 26:21 and this represents the ratio of total letters to consonants.

This ratio cannot be reduced further.

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3 years ago
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Answer:

Step-by-step explanation:

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