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Q#1
Probability and Statistics
GATE EE 2023
NAT
+2 marks
-0 marks
The expected number of trials for first occurrence of a "head" in a biased coin is known to be 4. The probability of first occurrence of a "head" in the second trial is __________ (Round off to 3 decimal places).
Explanation:
∴ Coin is biased
If P (Head) = p then P(Tail) = 1 – p = q
Assume head occurs for first time on 
trial
For other (n-1) trial Tail must appear
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