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If the binary operation o. is defined on...

If the binary operation `o.` is defined on the set `Q^+` of all positive rational numbers by `ao.b=(a b)/4dot` Then, `3o.(1/5o.1/2)` is equal to

A

`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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  15. Consider the binary operation * defined on Q-{1} by the rule a*b= a+...

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