The average is 2. To find the average you add all the numbers then divide the sum by the total amount of numbers.
Answer:
1183
Step-by-step explanation:
Common difference:
d = 31 - 15 = 16
nth term:

Here, 


Wouldn’t it be 4^P
i light be wrong
Replace X with 3 and simplify. The answer you would get is 11.