A radionuclide has a half life of 10 s. Which of the following statements are correct? (a) In a sample, probability that a nucleus will decay in next 10 s is 0.5. (b) In a sample, the probability that a nucleus which has survived first 10 s, will decay in next 10 s is 0.5. (c) The probability that a nucleus which has survived first 10 s, will decay in next 10 s is 0.25. (d) If a sample of radionuclide has 4 nuclei, two nuclei will decay in next 10 s.

Answer

(a),(b)