A bag of marbles has 3 red, 4 blue, and 5 white marbles in it. What is the probability of reaching in and selecting a blue marble? (without looking)

Question

asked Jan 20, 2020 208k views

1 Answer

Palisand · Answer 1 · 2020-01-25T21:08:40+0000

Answer:

P(B)=(1)/(3)

Explanation:

The number of red marbles in the bag is;
n(R)=3 .

The number of blue marbles in the bag is;
n(B)=4 .

The number of white marbles in the bag is;
n(W)=5 .

The total number of marbles in the bag is:
n(S)=3+4+5=12 .

The probability of selecting a blue marble is
P(B)=(n(B))/(n(S))

We substitute the given information to obtain:

P(B)=(4)/(12)

We simplify to obtain:

P(B)=(1)/(3)