Answer:
87.5 %
Step-by-step explanation:
Set up a ratio:
7/8 = x/100
Cross multiply to solve for x:
8x = 700
x = 87.5
Answer:
a) The probability that at least 5 ties are too tight is P=0.0432.
b) The probability that at most 12 ties are too tight is P=1.
Step-by-step explanation:
In this problem, we could represent the proabilities of this events with the Binomial distirbution, with parameter p=0.1 and sample size n=20.
a) We can express the probability that at least 5 ties are too tight as:

The probability that at least 5 ties are too tight is P=0.0432.
a) We can express the probability that at most 12 ties are too tight as:

The probability that at most 12 ties are too tight is P=1.
Answer:
<em>(B). 319 </em>
Step-by-step explanation:
=
=
x =
≈ <em>319</em>
Answer: 3 chip bags for every 2 pretzel bag, or 3:2
Hope that ratio helps