2 years ago

Person A tosses a penny. Person B tosses 2 pennies

Mathematics

1 answer:

Helen [10]2 years ago

5 0

Person C tosses 3 pennies?

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She has one orange pick for every two green picks how many green picks does she have if she has 12 total picks

Lelechka [254]

She has 6 green picks, because 2*6=12.

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2 years ago

If A and B are independent events with P(A) = .5 and P(B) = .2, find the following:a) P(A U B)b) P(A^c ? B^c)c) P(A^c U B^c)**No

Effectus [21]

If A and B are independent, then $P(A\cap B)=P(A)P(B)$ .

$P(A\cup B)=P(A)+P(B)-P(A\cap B)=P(A)+P(B)-P(A)P(B)$

$P(A\cup B)=0.5+0.2-0.5\cdot0.2$

$\boxed{P(A\cup B)=0.6}$

b. I'm guessing the ? is supposed to stand for intersection. We can use DeMorgan's law for complements here:

$P(A^c\cap B^c)=P(A\cup B)^c=1-P(A\cup B)$

$P(A^c\cap B^c)=1-0.6$

$\boxed{P(A^c\cap B^c)=0.4}$

c. DeMorgan's law can be used here too:

$P(A^c\cup B^c)=P(A\cap B)^c=1-P(A\cap B)=1-P(A)P(B)$

$P(A^c\cup B^c)=1-0.5\cdot0.2$

$\boxed{P(A^c\cup B^c)=0.9}$

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2 years ago

Tina is planning to paint a wood box she is using small paint cans that cover 20 square feet of surface area how many cans will

valkas [14]

Answer:

How much is the ouside of the box?

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2 years ago

Solve fI the one variable using the distriputive property <br> -6(2+a)=-48

Sloan [31]

Distribute
-12 -6a = -48
Add 12 to isolate -6a
-6a = -36
Divide by -6 on both sides to isolate a
a = 6

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3 years ago

Carlos has scored 83, 81, and 73 on his previous three tests. What score does he need on his next test so that his average (mean

disa [49]

Answer:

Step-by-step explanation:

let x be his mark in the fourth test, then

mean = $\frac{83+81+73+x}{4}$ = 83 ( multiply both sides by 4 )

83 + 81 + 73 + x = 332

237 + x = 332 ( subtract 237 from both sides )

x = 95

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3 years ago