Plutonium decays with half life of 24000 years. If plutonium is stored for 72000 years, the fraction of it that remains is

Options

A. `1//8`
B. `1//3`
C. `1//4`
D. `1//2`

Answer

a

Explanation

Here, n=`72000/24000=3, N/N_0=(1/2)^n =(1/2)^3 =1/8`