Mean, Mean, _x = 7.5

Standard Deviation, _x = 0.178

ITEM: Globe Ball/ Big Pencil/ Globe Keychain

COST (x): $.70 / $.35 / $.25

PROBABITITY: .3 / .5 / .2

A second grade teacher gives students prizes for participating in a geography extra-curricular activity.There are three prizes that a student can choose from.The table shows the cost of the item and the probability that the item will be chosen.The student can only choose one prize.On one occasion twenty children participated.As the teacher looks at the prize box and she realizes that it only contains four globe key chains.What is the probability that on this occasion the five or more children want a key chain for a prize?

What is the probability that a child will choose a globe key chain or a big pencil?