Complete question:
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?
Answer:
480 pennies
Explanation:
Total pennies = 1200
Datwd before 1980 = 25%
Dated 1980 - 2000 = 35%
The rest are Dated after 2000 ;
How many are dated after 2000
Dated before 1980 = 25% ;
25% of 1200
0.25 * 1200 = 300
Dated 1980 - 2000 = 35% ;
0.35 * 1200 = 420
Dated after 2000 ;
1200 - (300 + 420)
1200 - 720
= 480 pennies