A group of related facts that use the same number is a fact family
Answer:
176/231
Step-by-step explanation:
88 blue marbles, 55 green marbles, and 88 red marbles =231 marbles
P (blue or red marble) = number of red or blue/ total
= 88+88 / 231
=176/231
Could be 154. 154 rounded to nearest ten= 150, rounded to nearest 100= 200