Answer:
x = -345
Step-by-step explanation
2.3 + .02x + .4 - 4.8 = -9
2.7 - 4.8 + .02x = -9
-2.1 + .02x = -9
.02x = 6.9
x = -6.9 / .02
x = -345
Therefore we can write the equation as follows:
Dividing both sides by n!, we get:
Therefore n - 2 = 17 and n = 19
The answer is: n = 19
Answer:
a)
b)
And adding the values we got:
Step-by-step explanation:
Previous concepts
The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".
Solution to the problem
Let X the random variable of interest "number of teens that have heard of a fax machine", on this case we now that:
The probability mass function for the Binomial distribution is given as:
Where (nCx) means combinatory and it's given by this formula:
Part a
For this case we want this probability:
Part b
For this case we want this probability:
And adding the values we got:
Answer:
5
Step-by-step explanation:
How many times can 20 go into 100?
20,40,60,80,100...
1,2,3,4,5!!
The answer is 5!
Hope it helps!