Answer:
sum of ratio term = 2+5
= 7
first we have to find the value of 2 in ratio term
50 x 7/2
175
now, we have to find value of 5 in ratio term
50 x 7/5
70
addition of both the value of 2 and 5 in ratio term
175+70
245
hence, your answer is 245 marbles
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