Answer:
1.15%
Step-by-step explanation:
To get the probability of m independent events you multiply the individual probability of each event. In this case we have m independent events, each one with the same probability, therefore:


This is a particlar scenario of binomial distribution problem. So the binomial distribution questions are about the number of success of m independent events, where every individual event has the same p probability. In the question we have 20 events and each event has a probability of 80%. The binomial distribution formula is:

n is the number of events
k is the number of success
p is the probability of each individual event
is the binomial coefficient
the binomial coefficient allows to find the subsets of k elements in a set of n elements. In this case there is only one subset possible since the only way to get 20 of 20 correct questions is to getting right all questions (for getting 19 of 20 questions there are many ways, for example getting the first question wrong and all the other questions right, or getting second questions wrong and all the other questions right, etc).

therefore, for this questions we have:

add the 2 probabilities together:
0.297 + 0.423 = 0.72
Answer is C
Answer:
37/7
Step-by-step explanation:
to get 37-
7x5+2, then you get 37! you then put that over the denpminator, if you're confused look at the pic
10 inches of snow produce about an inch of water. However, this number can vary depending on the area, temperature, etc.
hope this helps
DE is parallel to BC since D is the midpoint of
AB and E is the midpoint of AC.
<span>
Thus, DE and BC have the same slope (0.5) and basing on the formula for
midpoint, the length of DE would be the equal half of BC and is equal to 1.6
units</span>
The slope and length of DE, if the slope and
length of BC are 0.5 and 3.2 units, respectively are 0.5 and 1.6
respectively.
I am hoping that this answer has
satisfied your query and it will be able to help you in your endeavor, and if
you would like, feel free to ask another question.