A class is made up of 6 boys and 12 girls. half of the girls wear glasses. a student is selected at random from the class. what
1 answer:
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Vertex: ( -1, -7 )
Focus: ( -1, -27/4 )
Axis of Symmetry: x = -1
Directrix: y = -29/4
X | Y
———
-3| -3
-2| -6
-1 | -7
0 | -6
1 | -3
Focus: ( -1, -27/4 )
Axis of Symmetry: x = -1
Directrix: y = -29/4
X | Y
———
-3| -3
-2| -6
-1 | -7
0 | -6
1 | -3
Answer:
$ 7.7
Step-by-step explanation:
Given,
There are 18 $1 bills, ten $5 bills, eight $10 bills, three $20 bills, and one $100 bill,
Total number of bills = 18 + 10 + 8 + 3 + 1 = 40,
Thus,
The probability of $ 1 =
The probability of $ 5 =
The probability of $ 10 =
The probability of $ 20 =
The probability of $ 100 =
If a bill is selected randomly,
The expected value of the bill
= $ 7.7