Question

A box of crayons has one each of red, orange, yellow, green, blue, purple, black, and brown. What is the probability of randomly selecting the black crayon and then randomly selecting the purple crayon if you do replace the first crayon before selecting the second crayon?

Answer 1

P( selecting black crayon)= 1/8
P ( selecting purple crayon) 1/8
P ( B,P)= 1/8 x 1/8 = 1/64
The probability is 1/64 and you can draw a tree diagram to visualise the two events.