Mean of 4, 8, 12.

**The reasoning** The **mean** (or average) is the sum of all values divided by how many values you have. Here's the calculation: - Sum = 4 + 8 + 12 = 24 - Count = 3 numbers - Mean = 24 ÷ 3 = **8** Think of it like sharing money equally: if you have ₦24 to share among 3 people, each gets ₦8. **Why the wrong options tempt you** **A) 6** – You might subtract instead of adding, or divide by the wrong number (24 ÷ 4 = 6). The trap is using 4 (the first number) as your divisor instead of 3 (the count). **C) 10** – This looks like the "middle" between 4 and 12, but that's just finding the midpoint of two numbers, not the mean of all three. **D) 12** – You might pick the largest number by mistake, forgetting that mean requires actual calculation. **Quick takeaway** Mean = Add everything up, then divide by how many numbers you counted—always verify your "how many" is correct!