Answer:

Explanation:
Given,
- Total number of marbles = 6
 - Number of blue marbles = 2
 - Number of yellow marbles = 1
 - Number of red marbles = 3
 
We are asked to find the probability of choosing a blue marble if they are randomly chosen. Then,
Probabilty of a blue marble
= Number of blue marbles / Total number of marbles
 = 2/6 
= 1/3
