Question
You have three 1-bills two 5-bllls , and a 20-bVert Vert In your pocket. If without replacing the first bill you pick out, what is the P 1 and 20 A (1)/(3) B (1)/(10) C (1)/(5) D (1)/(2)
Solution
4
(298 Votes)
Jaycee
Master ยท Tutor for 5 years
Answer
### C.
Explanation
## Step 1: Calculate the total number of bills.### You have three
1
\
bills, and one
20
3 + 2 + 1 = 6
\
bill first.### The probability of picking a
1
\
bills divided by the total number of bills:
.## Step 3: Calculate the probability of picking a
20
\
bill, there are 5 bills remaining. The probability of picking a
20
\
bills divided by the remaining number of bills:
.## Step 4: Calculate the probability of picking a
1
\
bill.### The probability of both events happening is the product of their individual probabilities:
.