Answer:
x+6+x+x
Step-by-step explanation:
x+6+x+x =3x+6
Answer:
a=5
Step-by-step explanation:
15=3a
1. You need to try to get the variable alone, in this case its a
2. So you divide 15 by 3
3. That will give you 5=a or a=5
Answer: d. .2474.
Step-by-step explanation:
Given : The cashier service time at the local branch of the Rivertown bank has an exponential distribution with a mean of 2.5 minutes.
The cumulative distribution function for exponential distribution is :-
, where
= Mean of the distribution.
The probability that the service time is between 2 and 4 minutes will be :

Hence, the correct option is d. .2474.