Question

You have four $1bills,three$5 bills, and two $10billsinyourwallet.Ifyoupickabillatrandom,whatistheprobabilitythatitwillbea$1 bill?

Short answer

The probability of selecting $1 bill is$\frac{4}{9}$

Step-by-step solution

Step 1. Given information

You have four $1 bills, three $5 bills, and two $10 bills in your wallet.

Step 2. probability of selecting $1 bill

The number of $1 bill is 4

Total number of bills $4+3+2=9$

The probability of selecting $1 bill can be calculated by using the probability equation

$P\left(A\right)=\frac{\text{Number of Favourable Outcome}}{\text{Total Number of F avourable Outcomes}}=\frac{n}{N}$

Substitute $n=4,N=9$in the equation and evaluate

$P\left(\$1\right)=\frac{4}{9}$