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?


To find out how many pennies in Russell's collection are dated after 2000, we can proceed step by step.

### Step 1: Total pennies in the collection
Russell has 1,200 pennies in total.

### Step 2: Breakdown of percentages
- 25% are dated before 1980.
- 35% are dated between 1980 and 2000.
- The rest are dated after 2000.

### Step 3: Calculate pennies dated before 1980
The number of pennies dated before 1980 is 25% of 1,200:
\[
\frac{25}{100} \times 1,200 = 0.25 \times 1,200 = 300
\]

### Step 4: Calculate pennies dated between 1980 and 2000
The number of pennies dated between 1980 and 2000 is 35% of 1,200:
\[
\frac{35}{100} \times 1,200 = 0.35 \times 1,200 = 420
\]

### Step 5: Calculate pennies dated after 2000
The remaining percentage of pennies is dated after 2000. We can subtract the percentages of the other groups from 100%:
\[
100\% - 25\% - 35\% = 40\%
\]
Thus, 40% of the pennies are dated after 2000. The number of pennies dated after 2000 is:
\[
\frac{40}{100} \times 1,200 = 0.40 \times 1,200 = 480
\]

### Final Answer:
Russell has **480 pennies** dated after 2000.

Would you like more details or explanations? 

Here are 5 related questions you might explore:
1. How many pennies dated before 1980 and after 2000 combined?
2. What percentage of Russell's collection was minted in or before 2000?
3. If Russell adds 300 more pennies, with 50% dated after 2000, how many pennies in total would be dated after 2000?
4. How would the distribution change if Russell sold 100 pennies from the before 1980 group?
5. What if 20% of pennies from each group were removed? How many after 2000 would remain?

**Tip**: Always verify percentages add up to 100% when dividing sets into categories!

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?

Find out how many pennies in Russell's collection are dated after 2000. With 1,200 pennies, 25% dated before 1980, and 35% dated between 1980 and 2000, we calculate how many are from after 2000 using percentages and basic arithmetic. Ideal for students in Grades 4-6.

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