Q. The half-life of a radioactive element is 8 days. After 24 days, the fraction of the original radioactivity that remains is

एक रेडियोधर्मी तत्व का आधा जीवन 8 दिन है। 24 दिनों के बाद, मूल रेडियोधर्मिता का जो अंश बचता है वह है

1/3

1/4

1/8

3/8

After 24 days (which is 3 half-lives of 8 days each), the remaining fraction is:
$(1 / 2)^{3} = 1 / 8$

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