3 times as many green beads as red beads,

Twice as many blue as green

150 beads total.

How many are green

33.3

Step-by-step explanation:

Let the number of green beads = G

Let the number of red beads = R

Let the number of blue beads = B

3*G=1R (1)

2B=G (2)

From equ (1), If G=2, R=6

From equ (2), 2B=2, B=1

Number of green beads = 2/9 * 150=33.3