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3 years ago

Find the expected value of the random variable with the given probability distribution

Mathematics

1 answer:

Nataly_w [17]3 years ago

8 0

Answer:

36.99

Step-by-step explanation:

Expected value is the sum of each outcome multiplied by its probability.

X = 25(0.05) + 27(0.06) + 70(0.27) + 52(0.25) + 6(0.37)

X = 36.99

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What mixed number can this improper fraction be converted to 5/2

BigorU [14]

The improper fraction 5/2 can be converted to the mixed number 2 1/2

4 0

3 years ago

The time, t, required to travel a fixed distance varies inversely as the

Lemur [1.5K]

You must travel at 42 mph for 4 hours

Solution:

Time varies inversely as rate of motion

Let "t" be the time required

Let "r" be the rate of motion

Then, we get

$t \propto \frac{1}{r}\\\\t = k \times \frac{1}{r}\\\\t = \frac{k}{r} -------- eqn 1$

Where, "k" is the constant of proportionality

You travel 3 hours at a rate of 56 mph

Substitute t = 3 and r = 56 in eqn 1

$3 = \frac{k}{56}\\\\k = 3 \times 56\\\\k = 168$

Find the rate you must travel for 4 hours

r = ? and t = 4

Substitute t = 4 and k = 168 in eqn 1

$4 = \frac{168}{r}\\\\r = \frac{168}{4}\\\\r = 42$

Thus you must travel at 42 mph for 4 hours

4 0

4 years ago

HELP ASAP

boyakko [2]

Answer:

4 ounces

Step-by-step explanation:

46/92 is one half so the recipe out of 100 is divided in half

8/2=4

the recipe also doesn't sound to appetizing

7 0

3 years ago

Please help me, I promise I will give Brainliest to the first answer as long as it is correct, I don't care if there is no expla

bezimeni [28]

Answer:

Part A: See detail below.

Part B: Company B charges less than company A for 8 windows.

Part C: The saving using company B for 6 windows is $3.

Step-by-step explanation:

Part A:

Company A: (total charges) = ($6)x(N number of windows)+($12)

Company B: (total charges) = ($5)x(N number of windows)+($15)

Part B:

Company A for 8 windows: 6*8+12=$60

Company B for 8 windows: 5*8+15=$55

Part C:

(Saving) = (6*6+12)-(6*5+15)=48-45= $3

3 0

3 years ago

M=110 what is m, the measure in degree s of third angle m=40 m=70 m-30

Ymorist [56]

M=70 cause 180-110=70

8 0

3 years ago