Question
An unbiased coin is tossed until a head appears. The expected number of tosses required is
Solution
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.
More Research Questions
- The velocity of money is
- If rxy = 0.75, then ryx will be:
- For Ram, coarse rice is an inferior good. This means
- Which of the following is not correct?
- What do you mean by ‘under conditions of a perfect competition in the product market’?
- The J-Curve effect describes:
- If 50 percent of the families in a certain city subscribe to the morning newspaper, 65 percent of the families subscribe to the afternoon newspaper and 85 ...
- What is the primary target focus of the recently upgraded Pradhan Mantri Matsya Sampada Yojana (PMMSY) sub-scheme?
- Question 9
- When a firm’s decision to produce decreases the wellbeing of others, but the firm does not compensate those others. It is a case of______.
