Answer:
in the dictionary.
Step-by-step explanation:
There are many ways to answer this question, but one example is 13 + 70 = 83
Answer:
36
Step-by-step explanation:
if you change all of the x's to 4s you get 12 + (4) 4 + 4 and that then equals to 36
Answer:
a)9/100
b)35/100
=7/20
Step-by-step explanation:
this is the correct answer
please mark me as brainlist
Answer:
The probability of testing positive for one is 0.20.
The probability of testing negative for one sample is (1-0.2)=0.8.
We only save time when all five are negative, which has a probability of 0.8^5=0.32768.
This means that the expected number of tests is
combined sample tests negative = 1 with probability 0.32768
combined sample tests positive = 1+5 retests = 6 with probability 0.67232
Expected number of tests
=Σ nipi / n
=(1*0.32768+6*0.67232)/5 [divide by 5 because we tested 5 samples]
= 0.87232 < 1
So yes, there is a saving.
Note: In practice, all medical tests are not absolute, i.e. they give false-positives(α) and false-negatives (β). The ratios 1-α and 1-β are respectively measures of specificity and sensitivity.
These two parameters complicate the simplistic evaluation above.
