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If the binary operation `o` is defined on the set `Q^+` of all positive rational numbers by `aob=(a b)/4dot` Then, `3o(1/5o1/2)` is equal to `3/(160)` (b) `5/(160)` (c) `3/(10)` (d) `3/(40)`

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RD SHARMA ENGLISH-BINARY OPERATIONS-All Questions
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