Question

a bag contains 18 red, 20 blue and 17 green marbles. a random marble is drawn. what is the probability that the marble is green or blue? p(green or blue) = ?%

Explanation:

Step1: Calculate total number of marbles

Total marbles = Red + Blue + Green = \(18 + 20 + 17 = 55\)

Step2: Calculate number of green or blue marbles

Green or Blue marbles = Blue + Green = \(20 + 17 = 37\)

Step3: Calculate probability

Probability \(P=\frac{\text{Green or Blue marbles}}{\text{Total marbles}}=\frac{37}{55}\)

Step4: Convert to percentage

\(P=\frac{37}{55}\times100\%\approx67.27\%\)

Answer:

\(67.27\)