Problem-Solving and Data AnalysisEasy–MediumProbability of not wearing glasses
Problem-Solving and Data Analysis practice question
In a class of 30 pupils, 12 wear glasses. A pupil is chosen at random. What is the probability that the pupil does not wear glasses?
Answer: 3/5 or 0.6
18 of 30 do not wear glasses: 18/30 = 3/5.
Common wrong answers
- If you answered 18
- 18 is a count, not a probability.
- If you answered 2/5
- 2/5 is the probability of wearing glasses.
- If you answered 12/30
- 12/30 is the probability of wearing glasses.
More Problem-Solving and Data Analysis questions
- Easy–Medium
A jacket originally priced at $80 is discounted by 25%. What is the sale price? - Easy–Medium
A bag contains 3 red, 5 blue, and 2 green marbles. If one marble is drawn at random, what is the probability i… - Easy–Medium
A recipe uses 2 cups of flour to make 3 servings. How many cups of flour are needed for 12 servings? - Easy–Medium
What is the median of the data set 4, 7, 7, 9, 13? - Easy–Medium
The ratio of dogs to cats at a shelter is 5 to 3. If there are 40 dogs, how many cats are there? - Easy–Medium
A printer produces 8 pages every 5 seconds. At this rate, how many pages does it produce in 1 minute?
Not affiliated with the College Board. SAT is a trademark of the College Board.