railway RPF Constable Mock Test Series 2024 Quantitative Aptitude Ratio and Proportion Age

X ଏବଂ Y ବୟସ 4: 7 ଅନୁପାତରେ ଅଛି | ତିନି ବର୍ଷ ପୂର୍ବେ, ସେମାନଙ୍କ ବୟସର ଅନୁପାତ 1: 2. ସେମାନଙ୍କର ବର୍ତ୍ତମାନର ବୟସ (Y - X) ମଧ୍ୟରେ ପାର୍ଥକ୍ୟ କ’ଣ?

1
3
2
6
3
9
4
7.5
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