Q36. A sample of radioactive substance decays simultaneously by two processes A and B with half lives 1/2 and 1/4 h respectively. For the first half hour it decays with process A, next one hour with process B, and for further half an hour with both A and B. If originally, there are N

$\left(1\right)\frac{{N}_{0}}{{2}^{8}}\left(2\right)\frac{{N}_{0}}{{2}^{4}}\left(3\right)\frac{{N}_{0}}{{2}^{6}}\left(4\right)\frac{{N}_{0}}{{2}^{5}}$

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