ussell has a collection of 1,200 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000.

How many pennies in Russell’s collection are dated after 2000?
A.480
B.720
C.40
D.60

To find how many pennies in Russell’s collection are dated after 2000, we can follow these steps:

1. **Total number of pennies** = 1,200
2. **Pennies dated before 1980**:  
   25% of 1,200 = \( \frac{25}{100} \times 1200 = 300 \)

3. **Pennies dated from 1980 to 2000**:  
   35% of 1,200 = \( \frac{35}{100} \times 1200 = 420 \)

4. **Pennies dated after 2000**:  
   The remaining pennies are those dated after 2000. So:
   \[
   \text{Pennies after 2000} = 1200 - (300 + 420) = 1200 - 720 = 480
   \]

Thus, **480 pennies** are dated after 2000.

The correct answer is **A. 480**.

Would you like a more detailed breakdown, or do you have any other questions?

Here are 5 related questions to further explore the topic:
1. What is the percentage of pennies dated after 2000?
2. If Russell adds 300 pennies dated after 2000, what would the new percentage of these pennies be?
3. How many pennies are dated before 2000?
4. If the collection had 1,500 pennies with the same percentage distribution, how many would be dated after 2000?
5. What fraction of pennies are dated from 1980 to 2000?

**Tip**: When dealing with percentages, always break down the total first and calculate each category step-by-step to avoid mistakes.

Russell has a collection of 1,200 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000. How many pennies in Russell’s collection are dated after 2000? A.480 B.720 C.40 D.60

Learn how to calculate how many pennies in Russell's collection are dated after 2000. With a collection of 1,200 pennies, and given percentage distributions, this problem covers key concepts in percentages and arithmetic, suitable for students in Grades 5-7.

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