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.
The property/properties that must be possessed by a material to be chosen for making heating element of heating devices are:
(i) high melting poi...
Study the given number series and answer the question that follows.
2 6 7 4 9 3 6 5 1 9 5 2 4 5 9 4 2 3 7 1
How many even numbers are im...
The sum of four consecutive integers is 170. Which one of these four Integers is prime?
The ‘SHOX Gene’, sometimes appeared in news, is primarily in the context of:
Who among the following is the author of the book “From Dependence to Self Reliance”?
What is the wage ceiling limit under the Employees’ Deposit Linked Insurance Scheme?
A metallic wire having resistivity ρ is cut into four equal parts. The resistivity of each part is:
Average run scored by a batsman in 26 innings is 80. In next 6 innings, he scored runs with an average of ‘x’ so that his overall average increases ...
Words given on the left side of (::) are related with each other by some Logic/Rule/Relation. Select the missing word/word pair on the right side of (:...
Which of the following Strait is between Persian Gulf and Gulf of Oman?
