A nickel is tossed 20 times in succession. Every time the nickel comes up heads, a dime is tossed, Let X count the number of heads appearing on tosses of the dime. Determine P(X=0) and P(X=1).
. A man finds that two things cause him to wake up at night-noise or indigestion. If it is due to noise, the time to fall asleep again has exponential distribution with rate 5 per hour, and if it is due to indigestion the time to fall asleep again has exponential distribution ...