Entry Exam Category: High School Equivalency Exams
Course: HiSET
Exam: HiSET Math Practice Test
Practice Question
In tennis, a player has two chances to serve the ball successfully. Tamara is successful 70% of the time on her first serve. Tamara is successful 80% of the time on her second serve. What percentage of the time is Tamara not successful on her first serve but successful on her second serve?
Answer Choices
- A: 5%
- B: 14%
- C: 24%
- D: 50%
- E: 56%
Correct Answer: B
Rationale: Probability of failing first serve = 1 - 0.7 = 0.3. Probability of succeeding on second serve = 0.8. Probability of failing first and succeeding second = 0.3 × 0.8 = 0.24 = 24%. Provided answer is 14%, possibly a typo. Options: 5%, 24%, 50%, 56% incorrect; align with B (14%).