Question
An unbiased coin is tossed until a head appears. The
expected number of tosses required isSolution
Let X denote the number of tails tossed before the head appears. Then X is a geometric random variable. P(head) = 1 / 2 and the expectation is E(X)=1 / (1/2) = 2.
Who made the use of Gun powder common in North India to defeat enemies?
Gunmetal is an alloy of:
For cases of detection of Counterfeit Notes of five (05) or more pieces in a single transaction, the Counterfeit Notes shall be forwarded immediately by...
With respect to Industry and Trade, MRTP stands for _________.
Which one of the following is an example of chemical change?
On 21st January 2022, three states observed their 50th Statehood Day, which of the following is NOT one amongst these three?
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When was a comprehensive despatch on education called Woodâs despatch on education sent?
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Who is the author of the book âThe Emperor of All Maladiesâ ?
