Fina the unit rate Tor each. 14. It costs $27.00 for 4 pounds of Land O' Lakes cheese at the deli. 15. We drove 420 miles in 12 hours 420=12-35mph $27:4=6.75 per pound 17. A pump fills 42 gallons of gasoline in 8 minutes 16. 20 cl of water evaporates in 5 days 20:5=4C a olay 42-85.25gpm exchang-
Addition Rule of Probability
It simply refers to the likelihood of an event taking place whenever the occurrence of an event is uncertain. The probability of a single event can be calculated by dividing the number of successful trials of that event by the total number of trials.
Expected Value
When a large number of trials are performed for any random variable ‘X’, the predicted result is most likely the mean of all the outcomes for the random variable and it is known as expected value also known as expectation. The expected value, also known as the expectation, is denoted by: E(X).
Probability Distributions
Understanding probability is necessary to know the probability distributions. In statistics, probability is how the uncertainty of an event is measured. This event can be anything. The most common examples include tossing a coin, rolling a die, or choosing a card. Each of these events has multiple possibilities. Every such possibility is measured with the help of probability. To be more precise, the probability is used for calculating the occurrence of events that may or may not happen. Probability does not give sure results. Unless the probability of any event is 1, the different outcomes may or may not happen in real life, regardless of how less or how more their probability is.
Basic Probability
The simple definition of probability it is a chance of the occurrence of an event. It is defined in numerical form and the probability value is between 0 to 1. The probability value 0 indicates that there is no chance of that event occurring and the probability value 1 indicates that the event will occur. Sum of the probability value must be 1. The probability value is never a negative number. If it happens, then recheck the calculation.
![Fina the unit rate for eacn.
14. It costs $27.00 for 4 pounds of
Land O' Lakes cheese at the deli.
15. We drove 420 miles in 12 hours
420=12-35mph
$27=4=6.75 per pound
17. A pump fills 42 gallons of gasoline in 8 minutes
16. 20 cl of water evaporates in 5 days
20:5=4ci a olay
42=8015.25gpm
exchang-
Use unit rates to determine the better purchase.
4.28=20=0.214per oD
0.28125pePO
18. Frosted flakes
Box A: $4.28 for the 20 oz. box
2.25:8
Box B: $2.25 for the 8 oz. box
Purchase: $4. 28 for the 20 ozbo
because When you divi ale to
figure oU7 how much it is
Der pound 84.28 TS less
86.30÷16=0:393]S
$4.72=12=0.393
19. Aunt Jemima Syrup
Bottle A: $6.30 for the 16 oz bottle
Bottle B: $4.72 for the 12 oz bottle
Purchase: DH 72
because t is lessmoney per
O2 .
Use cross products to solve for the missing value in each proportion.
20,
21.
20
22.
14 8.C
25
20.6
14.5
70:9=8C
8.75= C
3-a
R.5
25.12
90:3-39:3 300:20 = 206:26
80 = 9
15=6
23.
24.
『+2 へ
25.
40
16.4
S(f+2)8
12-8
3.e
5.24
96:5 =5d:5.
19.2=d
20.8=3:3e÷3
695-e
8++8=0ts
&,3+さ8-8-0
240 +8-32-8=8=
26.
27.
Lh+Y
28.
i+í
5-5
25-9-99:99.4 4-6htし
2.7=9
9.9
ろしもこvhtいと
36+い
36こレ=しhシい
8i6=61t6-6
8it6
と(=i
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