Visit http://ilectureonline.com for more math and science lectures!

To donate:
http://www.ilectureonline.com/donate
https://www.patreon.com/user?u=3236071

A heavy nucleus Q of half-life 20 minutes undergoes alpha-decay with probability of 60% and beta-decay with probability of 40%. Initially the number of Q nuclei is 1000. The number of alpha-decay in the first one hour is:
A) 50
B) 75
C) 350
D) 525

Previous video in this series can be seen at:
https://youtu.be/pnVrObK0IXc
Next video in this series can be seen at:
https://youtu.be/28Uf-hAfJFk