The counting rate observed from a radioactive source at t=0 second was 1600 counts per second and at t=8 seconds it was 100 counts per second. The counting rate observed, as counts per second at t=6 seconds, will be

(a) 400                    (b) 300
(c) 200                    (d) 150

(c)

Again at t = 6 sec,

Difficulty Level:

• 6%
• 17%
• 73%
• 6%