Suppose we uniformly and randomly select a permutation from the 20...

Home / Engineering Maths / Probability And Statistics / Question

Examveda

Suppose we uniformly and randomly select a permutation from the 20! permutations of 1, 2, 3 ...., 20. What is the probability that 2 appears at an earlier position that any other even number in the selected permutation?

A. $$\frac{1}{2}$$

B. $$\frac{1}{{10}}$$

C. $$\frac{{9!}}{{20!}}$$

D. None of these

Answer: Option D

This Question Belongs to Engineering Maths >> Probability And Statistics

Join The Discussion

Related Questions on Probability and Statistics

Aishwarya studies either computer science or mathematics everyday. If she studies computer science on a day, then the probability that she studies mathematics the next day is 0.6. If she studies mathematics on a day, then the, probability that she studies computer science the next day is 0.4. Given that Aishwarya studies computer science on Monday, what is the probability that she studies computer science on Wednesday?

A. 0.24

B. 0.36

C. 0.4

D. 0.6

View Answer

View Answer

A coin is tossed 4 times. What is the probability of getting heads exactly 3 times?

A. $$\frac{1}{4}$$

B. $$\frac{3}{8}$$

C. $$\frac{1}{2}$$

D. $$\frac{3}{4}$$

View Answer

View Answer

A machine produces 0, 1 or 2 defective pieces in a day with associated probability of $$\frac{1}{6},\,\frac{2}{3}$$ and $$\frac{1}{6}$$ respectively. The mean value and the variance of the number of defective pieces produced by the machine in a day, respectively, are

A. 1 and $$\frac{1}{3}$$

B. $$\frac{1}{3}$$ and 1

C. 1 and $$\frac{4}{3}$$

D. $$\frac{1}{3}$$ and $$\frac{4}{3}$$

View Answer

View Answer

Let X and Y be two independent random variables. Which one of the relations between expectation (E), variance (Var) and covariance (Cov) given below is FALSE?

A. E(XY) = E(X) E(Y)

B. Cov (X, Y) = 0

C. Var (X + Y) = Var (X) + Var (Y)

D. E(X²Y²) = (E(X))² (E(Y))²

View Answer

View Answer

More Related Questions on Probability and Statistics