Final answer:
The probability of selecting a red marble from a jar containing 4 red marbles and 10 blue marbles is 2/7.
Step-by-step explanation:
The question is about determining the probability of selecting a red marble from a jar that contains a total of 14 marbles, 4 of which are red and 10 are blue. To find the probability, we divide the number of red marbles by the total number of marbles in the jar.
The formula for probability is P(event) = Number of favorable outcomes / Total number of outcomes.
In this scenario, the probability of selecting a red marble is calculated as follows:
P(red marble) = Number of red marbles / Total number of marbles = 4/14 = 2/7.
Therefore, the probability of selecting a red marble is 2/7.