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Questions by cocgame

2 votes
1 answer
1
GATE 2015 SET-2 Q 29
Let the random variable X represent the number of times a fair coin needs to be tossed till two consecutive heads appear for the first time. The expectation of X is _______.
Let the random variable X represent the number of times a fair coin needs to be tossed till two consecutive heads appear for the first time. The expectation of X is _____...
1 votes
2 answers
2
PROBABILITY QUESTION
3 votes
1 answer
3
GATE 2017 - [EE]
A person decides to toss a fair coin repeatedly until he gets a head. He will make at most 3 tosses. Let the random variable Y denote the number of heads. The value of var (Y) where var (.) denotes the variance, equals (A) 7/8 (B) 49/64 (C) 7/64 (D) 105/64
A person decides to toss a fair coin repeatedly until he gets a head. He will make at most 3 tosses. Let the random variable Y denote the number of heads. The value of va...