In the bag

I have red and blue marbles in a bag in a ratio of 7 : 2. There are 45 marbles in total. How many are red?

Final Answer:

a =  35

Step-by-step explanation:

n=45 a:b = 7:2 = 7x :2x  x=7+2n=7+245=5  a=7 x=7 5=35



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