From a pile of 100 pennies (P), 100 nickels (N), and 100 dimes (D), select 21 coins which have a total value of exactly $1.00. In your selection, you must also use at least one coin of each type. How many coins of each of the three types (P, N, D) should be selected?

So, you need 10 penny, 4 nickles and 7 dimes Lets, check it. According to the question, total coins = 21 7 + 4 + 10 = 21 21 = 21.........................................true Now, their value should equal $1.00 = 100 cents Penny = 1 cent nickle = 5 cent dime = 10 cent, So, (10 *1) + (4 * 5) + (7 * 10) = 100 10 + 20 + 70 = 100 100 = 100......................................true


So, you need 10 penny, 4 nickle, and 7 dimes

Answered by rabinshrestha41 | 2024-06-10

To achieve a total of $1.00 using 21 coins, select 10 pennies, 4 nickels, and 7 dimes. This combination satisfies both the requirement of total number of coins and their total value. Each type of coin is used at least once as required.
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Answered by rabinshrestha41 | 2024-10-01