Question

a bag contains 15 black marbles, 12 white marbles and 25 blue marbles. if a marble is picked at randomy, find the probability that the marble is white.

Explanation:

Step1: Calculate total number of marbles

Total marbles = \(15 + 12+25=52\)

Step2: Use probability formula

Probability \(P=\frac{\text{Number of white marbles}}{\text{Total number of marbles}}\)
Number of white marbles \(n = 12\), total marbles \(N=52\)
\(P=\frac{12}{52}=\frac{3}{13}\)

Answer:

\(\frac{3}{13}\)