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Answer : Option D
Explanation :
x * 1 = 3 * 5/3
x = 5
Answer : Option B
5:1 = x: 10
x = 50
a: b = 7: 5
b: c = 9: 11
a: b: c = 63: 45: 55
Answer : Option A
a/d = (3/4)*(7/9)*(5/7) => 5/12
1/3: 1/2: 1/1 = 2:3:6
Answer : Option C
32: 42 = 9:16
13: 23 = 1:8
The sub-duplicate ratio of 1:4 is