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goldfiish
1 month ago
12

Cathy has a nickel, a dime, and a quarter in her purse. She randomly picks a coin, replaces it, and then picks another coin. The

probability that the two coins are of different denominations is .
SOMEONE HELP PLEASE THIS IS FOR PLATO.
Mathematics
2 answers:
Zina [12.3K]1 month ago
6 0

You could multiply 3•2 since that equals 6, and with 2\6 it makes the number smaller, resulting in 1/3. You then get 0.3333 repeating

.
lawyer [12.5K]1 month ago
3 0

Solution:

Therefore, the probability that the two coins drawn are of different denominations is:

                            2/3

Detailed explanation:

Let N represent nickel, D for dime, and Q for quarter.

When drawing two coins sequentially with replacement, the possible outcomes are:

         (N,N)     (N,D)      (N,Q)

         (D,N)     (D,D)      (D,Q)

         (Q,N)     (Q,D)      (Q,Q)  

This shows there are a total of  9 outcomes.

The favorable outcomes, where both coins are different denominations, total 6:

{ (N,D) (N,Q) (D,N) (D,Q) (Q,N) (Q,D) }

The probability for two coins being of different denominations is:

                             6/9=2/3

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