Answer:
The probability that at most 38 of the 60 relays are from supplier A is P(X≤38)=0.3409.
Step-by-step explanation:
We can model this question with a binomial distribution random variable.
The sample size is n=60.
The probability that the relay come from supplier A is p=2/3 for any relay.
If we use a normal aproximation, we have the mean and standard deviation:

The probability that at most 38 of the 60 relays are from supplier A is P(X≤38)=0.3409:

Answer:
A
Step-by-step explanation:
Answer: x=12
Srry if its wong!
Hope this helps!
Step-by-step explanation:
Answer:
_|_____________________|_____________________|_
1/3 <u>2/3</u> 3/3
Step-by-step explanation:
draw a line:
____________________________________________
then divide the line by three's:
_|_____________________|_____________________|_
then mark the first part 1/3
the second 2/3 and third 3/3:
_|_____________________|_____________________|_
1/3 2/3 3/3