By the size , color, or if they have wings or no wings, etc. just think of what might be different on each one or group.
Answer:
0.2
Step-by-step explanation:
6+4+3+2=total no of marble
=15
no of blue marble 3

Answer:
805
Step-by-step explanation:
x=y-120÷7
y÷7=y-720÷7
7y=y-4830
y=4830÷6
y=805
Answer:
B and c
Step-by-step explanation: