Test your knowledge on different rules of probability and random variables.

Counting Techniques and Random Variables

Match the following rules to their working:

a. Multiplication rule
b. Factorial rule
c. Permutations rule
d. Combinations rule

i. If we have k independent choices to make, and the number of options for each choice are x1, x2, x3, x4, ...., xk then we can make all of the choices inx1* x2* x3…*xk ways

ii. 𝑛×(𝑛−1)×…×(𝑛−𝑘+1)

iii. 𝑛×(𝑛−1)×(𝑛−2)×…×2×1

iv. (𝑛×(𝑛−1)×…×(𝑛−𝑘+1))/𝑘×(𝑘−1)×…×1


