Choose the one alternative that best completes the statement or answers the question.
Solve the problem.
-A bag of marbles has twice as many blue marbles as green marbles, and the bag has at least 45 marbles in it. At least how many green marbles does it have?
A) At least 23 green marbles
B) At least 30 green marbles
C) At least 16 green marbles
D) At least 15 green marbles

Question

Quizplus · Accepted Answer

Let the number of green marbles be $g$ and blue marbles be $2g$. The total number of marbles is at least 45, so $g + 2g \geq 45$, which simplifies to $3g \geq 45$. Solving for $g$, we get $g \geq 15$. Therefore, the bag has at least 15 green marbles.

Choose the One Alternative That Best Completes the Statement or Answers