Modded SAT Question Bank
by Abdullah Mallik dedicated to DPT SAT Batches and Someone Special | GitHub
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Test
Math
Domain
Problem-Solving and Data Analysis
Skill
Probability and conditional probability
Difficulty
Easy
ID: 1353b86e
Modded SAT Question Bank by Abdullah Mallik
Colors of Marbles in a Bag
Color Number
Red 8
Blue 10
Green 22
Total 40

The table shows the number of different colors of marbles in a bag. If a marble is chosen at random from the bag, what is the probability that the marble will be blue?

  1. 30 over 40

  2. 22 over 40

  3. 18 over 40

  4. 10 over 40

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Correct Answer: D
Rationale

Choice D is correct. If a marble is chosen at random from the bag, the probability of choosing a marble of a certain color is the number of marbles of that color divided by the total number of marbles in the bag. Since there are 10 blue marbles in the bag, and there are 40 total marbles in the bag, the probability that the marble chosen will be blue is 10 over 40.

Choices A, B, and C are incorrect. These represent the probability that the marble chosen won’t be blue (choice A), will be green (choice B), and won’t be green (choice C).

 

Question Difficulty: Easy
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