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Simulating adding two binomial variables

In the last multiple choice exercise, you found the expected value of the sum of two binomials. In this problem you'll use a simulation to confirm your answer.

This exercise is part of the course

Foundations of Probability in R

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Exercise instructions

  • Simulate 100,000 draws from X, a binomial with size 20 and p = .3, and Y, with size 40 and p = .1.
  • Use this simulation to estimate the expected value of X + Y.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Simulate 100,000 draws of X (size 20, p = .3) and Y (size 40, p = .1)
X <-
Y <-

# Estimate the expected value of X + Y
Edit and Run Code