JEE Main & Advanced
JEE Main Paper (Held on 7 May 2012)
question_answer
A sample originally contained 1020 radioactive atoms, which emit a-particles. The ratio of \[\text{ }\!\!\alpha\!\!\text{ -}\]particles emitted in the third year to that emitted during the second year is 0.3. How many \[\text{ }\!\!\alpha\!\!\text{ -}\]particles were emitted in the first year?
JEE Main Online Paper (Held On 07 May 2012)