ExamVeda
Login
Home

A continuous random variable X has a probability density f(x) =...

This question belongs to Engineering Maths Probability And Statistics
Probability and Statistics
?

A continuous random variable X has a probability density f(x) = e-x, 0 < x < $$\infty $$ . Then P{X > 1} is

Answer & Solution
Correct Answer: Option A
Let's discuss the solution. Join the discussion
Examveda
Question posted by Examveda
Community

Join the Discussion

No comments yet Be the first to discuss this question.
Keep Learning

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
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. $$\frac{3}{4}$$
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 $$\frac{4}{3}$$
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
More Related Questions on Probability and Statistics