Maths · Probability: Probability of an event, addition and multiplication theorems of probability
A fair die is tossed 1620 times. If getting a face with 6 points is considered a
A fair die is tossed 1620 times. If getting a face with 6 points is considered as a success, then \( E(x)= \) \( \ldots \ldots ., V(x)=\dots \ldots . . \)
- A. 270,270
- B. 270,225
- C. 270,25
- D. 27,250
Step-by-step solution
The experiment is binomial with n = 1620 and p = 1/6. Expected value E(x) = np = 1620*(1/6) = 270. Variance V(x) = npq = 1620*(1/6)*(5/6) = 225.
Related MCQs
- If and are independent events such that <\mathbf{1}, \mathbf{0}<\boldsymbol{P}(\boldsymbol{B})<\mathbf{1}, \) then This question has multipl…
- What is the probability of selecting two spade cards from a pack of 52 cards?…
- If =\boldsymbol{P}(\boldsymbol{B}), \) then the two events and are -…
- The length of life of an instrument produced by a machine has a normal distribution with a mean of 12 months and standard deviation of 2 mon…
- The probability of an even happens in one trial of an experiment is Three independent trials of the experiments are performed. Find the prob…