Answer:
The answer is n=36 Hope this helps^_^
Step-by-step explanation:
plz give brainliest and rating
20 is permutation
22 is counting principle
Hope it help.
Answer:
I think y=3
Step-by-step explanation:
This one looks tricky let me find out
Answer:
Davide's age is 10.
L'età di Davide è 10.
Step-by-step explanation:
The average age of Aldo, Bruno, Carlo and Davide is 16 years.
I am going to say that:
x is Aldo's age.
y is Bruno's age.
z is Carlo's age.
w is Davide's age.
Average of the 4 is 16 years.
This means that:


If we do not consider Davide, the mean is 18. So


Replacing in the first equation:



Davide's age is 10.
L'età di Davide è 10.