The probability that the randomly selected numbers are divisible by 3 is 3/10.
The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true.
An event's probability is a number between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty.
So, the probability that the randomly selected number is divisible by 3:
Numbers under 20 divisible by 3 are: 3, 6, 9, 12, 15, 18
Total numbers: 20
Probability formula: P(E) = Favourable events/Total events
Now, substitute values and calculate as follows:
P(E) = 6/20
P(E) = 3/10
Therefore, the probability that the randomly selected numbers are divisible by 3 is 3/10.
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