Answer:
expected loss of 4/30 ≈ 0.13 dollars
Step-by-step explanation:
profit = revenue - expenses
expected profit= expected revenue - expected expenses
how i solve this is by multiplying each revenue and expense by its probability and solving from there
revenue of gold = 5
revenue of silver = 2
revenue of black = 0
this exhausts all of our revenue options
total marbles = 2+8+20 = 30
# of gold marbles = 2
probability of gold = 2/30
# of silver marbles = 8
probability of silver = 8/30
# of black marbles = 20
probability of black = 20/30
expected revenue = sum of possible revenues multiplied by their probability
= 5 * 2/30 + 2 * 8/30 + 0 * 20/30 = 10/30 + 16/30 = 26/30
cost = 1 no matter what
expected profit = expected revenue - expected expenses
= 26/30 - 1
= -4/30
= an expected loss of 4/30
4/30 ≈ 0.13
Answer:
1. x = 2
2. x = -2
3 x = 1
Step-by-step explanation:
Make x the subjects and work from there
Answer:
1 yard is $3.75
Step-by-step explanation:
4.4 to get 1 divide by 4.4
so divide 16.50 by 4.4 to get $3.75
Answer:
A. Count by hand.
B. Divide 20 by 2.
Step-by-step explanation:
The midpoint between two points is found by the mean of their coordinates.
Endpoints at (0,0) and (20,0)
So we have x coordinates of 0 and 20. Their mean is:
So we can find both counting by hand, or dividing 20 by 2.
First you need to find the area of the circle by doing πr², in which r is 6 because 12 ÷ 2 = 6. π × 6² = 36π. 360 ÷ 40° = 9, so you need to divide 36π by 9 which is 4π. 4π is equal to 12.57cm², which is your final answer. I hope this helps!