Final answer:
The sum of the numbers in the 4th row of the given series is 8.
Step-by-step explanation:
The sum of the numbers in the nth row of the given series is given as 2n. To find the sum of the numbers in the 4th row, substitute n = 4 into the formula.
Sum = 2n = 2 × 4 = 8.
So, the sum in the 4th row is 8.