Question 32 asks what operations should be performed in areas labeled 'A' and 'B' in the flowchart in Figure 1 to calculate the average of 25 exam scores. Question 33 asks how the flowchart in Figure 2 should be modified to calculate the sum of even numbers from 0 to 100 (inclusive).

1. Problem Description

Question 32 asks what operations should be performed in areas labeled 'A' and 'B' in the flowchart in Figure 1 to calculate the average of 25 exam scores.

Question 33 asks how the flowchart in Figure 2 should be modified to calculate the sum of even numbers from 0 to 100 (inclusive).

2. Solution Steps

Question 32:

In Figure 1, the flowchart calculates the average of $N$ exam scores.

- The flowchart initializes $I = 1$, $N = 25$, and $SUM = 0$.

- Inside the loop, it inputs the $I$'th exam score $X$.

- At area A, the current exam score should be added to the running sum. Thus, the operation should be $SUM = SUM + X$.

- The loop continues until $I > N$.

- After the loop, area B calculates the average $AVG$. Since the sum of the scores is stored in $SUM$, and the number of scores is $N$, the average is $AVG = SUM / N$.

Question 33:

In Figure 2, the flowchart calculates the sum of numbers from 0 to

1

0

0. The flowchart initializes $SUM = 0$ and $I = 0$. The loop continues as long as $I \le 100$. Inside the loop, $SUM = SUM + I$ and $I = I + 1$. To calculate the sum of even numbers from 0 to 100:

- The initial value of $I$ should be the first even number,

0. So changing $I=0$ to $I=2$ is wrong.

- The increment should be 2 to only add even numbers: $I = I + 2$.

- The summation remains the same: $SUM = SUM + I$. The number $I$ is only even in this summation.

3. Final Answer

Question 32:

(1) $Sum = Sum + x, Avg = Sum / N$

Question 33:

(2) Change the increment statement 'I = I+1' into 'I = I+2'