Question

a box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. if three marbles are picked at random, what is the probability that they are all blue?

Answer 1

Blue - 3
Red - 4
Green - 6
Yellow - 2
Total - 15
Probability of getting blue = 3* 3/15
= 0.6

Answer 2

Answer:

The probability of getting all blue marbles is $\frac{1}{5}$  

Step-by-step explanation:

Given : A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. if three marbles are picked at random.

To find : What is the probability that they are all blue?

Solution :

Blue marbles = 3

Red marbles = 4

Green marbles = 6

Yellow marbles = 2

Total marbles = 3+4+6+2=15

Favorable outcome (three marbles picked that are blue)=3

Probability that all three marbles are blue is

$\text{Probability}=\frac{\text{Favorable outcome}}{\text{Total outcome}}$

$\text{Probability}=\frac{3}{15}$

$\text{Probability}=\frac{1}{5}$

Therefore, The probability of getting all blue marbles is $\frac{1}{5}$