40+35 is the answer of the Ixl question
Answer:
5
Step-by-step explanation:
range is all possible y values of a function
What the size of the border is. Example. You want to fence your yard. What do you do. Measure the perimeter aka the border.
Answer:
The expected value of X is 2 with a standard deviation of 1.34.
Step-by-step explanation:
For each speaker, there are only two possible outcomes. Either it is defective, or it is not. The probability of a speaker being defective is independent of other speakers. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:

The standard deviation of the binomial distribution is:

Stereo speakers are manufactured with a probability of 0.1 of being defective
This means that 
Twenty speakers are randomly selected.
This means that 
Let the random variable X be defined as the number of defective speakers. Find the expected value and the standard deviation.


The expected value of X is 2 with a standard deviation of 1.34.
1.5 im sorrry again if im wrong:(
Step-by-step explanation:
im sorry if i am wrong