Question

A glass jar contains 1 red, 3 green, 2 blue and 4 yellow marbles. If a single marble is chosen at random from the jar:

A) Probability of getting a yellow marble is $\frac{1}{5}$ B) Probability of getting a green marble is $\frac{3}{10}$ C) Probability of getting either a yellow or a green marble is $\frac{7}{10}$ D) Probability of getting either a red or a yellow marble is $\frac{3}{10}$

Choose the correct answer from the options given below :

Accepted Answer

B. Total marbles = $1 + 3 + 2 + 4 = 10$. A) P(yellow) = $\frac{4}{10} = \frac{2}{5} 
eq \frac{1}{5}$. (Incorrect) B) P(green) = $\frac{3}{10}$. (Correct) C) P(yellow or green) = $\frac{4 + 3}{10} = \frac{7}{10}$. (Correct) D) P(red or yellow) = $\frac{1 + 4}{10} = \frac{5}{10} = \frac{1}{2} 
eq \frac{3}{10}$. (Incorrect) Thus, statements B and C are correct. Hence, Option B is correct.

Probability with Marbles

Explanation

Practise this under exam conditions