There are 10 boxes in a grab bag boxes are identical except for its at 7 of them contain $20 bills a contest winner gets too pick two boxes from the grab bag which is the probability of getting two $20 bills
Mathematics · College · Tue Nov 03 2020
Answered on
Given:
10 Identical Boxes, 7 of which contain $20 bills.
Find the probability of getting two $20 bills.
Solution:
We must first determine what is the percentage of taking a $20 bill from 10 boxes. Since 7 contains $20 bills, we can divide 7 by 10 to know the probability.
= 7/10
= 0.7
Change the decimal into percentage. In order to do so, multiply the decimal by 100, hence in changing a percentage into decimal, divide the percentage by 100.
= (0.7)(100)
= 70%
Since we are asked to find the probability of getting two $20 bills, we will divide 70% by 2.
= 70%/2
= 35%
The probability of getting two $20 bills is 35%.