Question

Malia keeps all her spare keys in a box under her bed. Recently, Malia decided the box was becoming unmanageable, as none of the keys were labeled. She set about labeling them with colored stickers that indicated what each key opened. Blue sticker Green sticker Front door of the house 2 3 Back door of the house 5 4 What is the probability that a randomly selected key opens the back door of the house given that the key is labeled with a blue sticker? Simplify any fractions.

Answer 1

we have that

If the box of cereal is mini size

then

the outcomes are

one price 2

two prices 1

so

the probability of selected a box of cereal contains one price is

P=2/3