Problem-Solving and Data AnalysisEasy–MediumProbability of drawing a multiple of 8
Problem-Solving and Data Analysis practice question
A box holds 40 cards numbered 1 through 40. One card is drawn at random. What is the probability that the number on the card is a multiple of 8?
Answer: 1/8 or 0.125 or 5/40
The multiples of 8 from 1 to 40 are 8, 16, 24, 32, and 40: five of forty cards.
Common wrong answers
- If you answered 1/5
- 1/5 counts 8 favourable cards instead of 5.
- If you answered 1/40
- 1/40 is the probability of one particular card.
- If you answered 4/40
- 4/40 leaves out 40 itself.
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.