Question

a jar contains 6 red marbles, 4 blue marbles, and 10 green marbles. if a marble is selected at random from the jar, which of the following is probability that it is not red? 1/5 7/10 3/10 1/2

Explanation:

Step1: Calculate total number of marbles

Total marbles = Red + Blue + Green = \(6 + 4 + 10 = 20\)

Step2: Calculate number of non - red marbles

Non - red marbles = Blue + Green = \(4 + 10 = 14\)

Step3: Calculate probability of non - red marble

Probability = \(\frac{\text{Number of non - red marbles}}{\text{Total number of marbles}}=\frac{14}{20}=\frac{7}{10}\)

Answer:

7/10 (corresponding to the option with 7/10)