I would like clarification in answering probability problems. As the two questions below indicate, there are different methods of getting the probability:
Example 1
A city survey found that 47% of teenagers have a part time job. Of those
teenagers, 78% also plan to attend college. If a teenager is chosen at
random what is the probability that he/she has a part time job and plans
to attend college?
Answer:
(.47)(.78) = .3666
Answer: 37% (to the nearest percent)
Example 2
In a school, 14% of students take drama and computers, and 67% take
computer class. What is the probability that a student taking computers
also takes drama?
Answer:
.14 ÷ .67 = .2090
Answer: 21% (to the nearest percent)
*source: https://www.vkg.werro.ee/aivar/toen/kordamine.htm
What elements of the question would help in determining the type of solution to be used?
Example 1
A city survey found that 47% of teenagers have a part time job. Of those
teenagers, 78% also plan to attend college. If a teenager is chosen at
random what is the probability that he/she has a part time job and plans
to attend college?
Answer:
(.47)(.78) = .3666
Answer: 37% (to the nearest percent)
Example 2
In a school, 14% of students take drama and computers, and 67% take
computer class. What is the probability that a student taking computers
also takes drama?
Answer:
.14 ÷ .67 = .2090
Answer: 21% (to the nearest percent)
*source: https://www.vkg.werro.ee/aivar/toen/kordamine.htm
What elements of the question would help in determining the type of solution to be used?
