In a group of 120 people, 90 have an age of more 30 years, and the others have an age of less than 20 years. If a person is selected at random from this group, what is the probability the person's age is less than 20?
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Answer:
1/4
Step-by-step explanation:
total number of people =120
number of people with age less than 20= 120-90 =30
probability of people with age less than 20= 30/ 120
=1/4
30 people have an age less than 20 years.
30 out of 120. this means you can do this relationship:
If 30 out of 120 are less than 20 years old, then picking one at random will yield you with a 1 in 4 chance or 25% chance of picking someone leas than 20 years old.
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