Answer:
a) 0.2182
b) 0.0691
c) 0.9309
Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly b successes on n repeated trials, and B can only have two outcomes.
In which is the number of different combinations of b objects from a set of n elements, given by the following formula.
And p is the probability of B happening.
In this problem we have that:
Bin(20,0.2).
This means that
(a) P(B=4).
(b) P(B≤1).
(c) P(B>1).
Either B is less than or equal to 1, or B is larger than 1. The sum of the probabilities of these events is decimal 1. So
We have that, from b),
So
To find the percentage that the customer wants reduced, we use this equation:
8n = 4.5
n = 4.5/8
n = 0.5626
Because javier believes that reducing 12% 5 times would work, he is assuming that:
56.26 - 60 = 0
This is not the case.
Javier's boss is correct.
Answer:
50 %
Step-by-step explanation:
P=1
7p + 13=20
-13 | -13
7/7
P=1
Sometimes because the interior is not always 90and hence its possible but not always the case