Question

In a box containing marbles, 78 are blue, 24 are orange, and the rest are green. If the probability of selecting a green marble is 2/5, how many green marbles are in the box?

Answer 1

hint: set up a proportion

let x = number of green marbles

green marbles/total marbles = 2/5

know where to go from there?

Answer 2

ok but i don't have the total marbles

Answer 3

\[\frac{g}{g+78+24}=\frac{2}{5} \]Solve the above for g, the number of green marbles.
Mathematica came up with g = 68 .

Answer 4

thnx

Answer 5

bye

Answer 6

Your welcome.