Answer:
The answer is
.
Step-by-step explanation:
Given:
77.5%.
Now, to write as a fraction or mixed number in simplest form.
77.5%
So, we divide by 10 by removing decimal as decimal is at tenth place.
= 
So, simplifying it:

Now, we change into mixed fraction:

Therefore, the answer is
.
Answer:
i dont know
Step-by-step explanation:
srry wish i could help you
I THINK IT IS B
B) D(X)= X-8x4
180-132+x-6x+12=0
48+x-6x+12=0
48-5x+12=0
60-5x=0
-5x=-60
x=12
<span><span>The probability of all calculators having no defects is 16.8%. The probability of at least one defect is the complement of that probability.
ie an 83.2% probability of at least one defect.</span><span>
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