P = 0.0688
The first thing is to calculate the total number of coins:
17 + 10 + 19 + 23 = 69
Probability
Probability is simply how likely something is to happen. Whenever we're unsure about the outcome of an event, we can talk about the probabilities of certain outcomes—how likely they are. The analysis of events governed by probability is called statistics.
Fraction
A fraction is a part of a whole. In arithmetic, the number is expressed as a quotient, in which the numerator is divided by the denominator. In a simple fraction, both are integers. A complex fraction has a fraction in the numerator or denominator. In a proper fraction, the numerator is less than the denominator.
The probability in this case will be the product between the probability of each event, the probability of each event would be the number of favorable cases divided by the total number of coins, therefore:
P(nickel) = 19/69
P(penny) = 17/68
Therefore
P = 19/69 * 17/68
P = 323/4692
P = 0.0688
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