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zimovet [89]
3 years ago
13

y Probability 10 0.10 20 0.25 30 0.05 40 0.30 50 0.20 60 0.10 The probability distribution of y, a discrete random variable, is

given in the table. What is the expected value of y? A. 25.0 B. 26.5 C. 35.0 D. 35.5
Mathematics
2 answers:
Vitek1552 [10]3 years ago
4 0

Answer:

B

Step-by-step explanation:

snow_lady [41]3 years ago
4 0

Answer:

The answer is D.35.5 got it right on plato

Step-by-step explanation:

You might be interested in
Find the midpoint of A and B where A has coordinates (-7, 1)<br> and B has coordinates (3,-5).
zepelin [54]

Answer:

A (-7, 1) = (X1, Y1)

B (3, -5) = (X1, Y2)

Now,

Mid point = (X1 + X2÷2, Y1 + Y2 ÷ 2)

= {-7+3÷2, 1+(-5)÷2}

= (-4÷2, 1-5÷2)

= (-4÷2, -4÷2)

= (-2, -2)

Step-by-step explanation:

I hope it will help you to study.

3 0
2 years ago
James answered 14 items correctly on a 16-item quiz. what percent did he answer correctly?
Troyanec [42]
So,

I like to simplify a fraction first.  This is what I do when I'm in a store trying to find the unit price.

\frac{14}{16}

Factor.
\frac{2*7}{2*2*2*2}

Cross out ones.
\frac{7}{2*2*2}

Multiply it out.
\frac{7}{8}

In my head, I remember that one-eighth is equal to 0.125.

So seven-eighths is equal to 0.125 times 7.
0.125 * 7 = 0.875

Convert to percent form.
0.875 --> 87.5%

James answered 87.5% of his quiz correctly.

I actually have the decimal equivalents for eighths in my head when I'm shopping.  So once I get seven-eighths, I immediately know how much that is.  I can also subtract 0.125 from 1.000 to get seven-eighths.
3 0
3 years ago
Read 2 more answers
Solve for c.<br> 55c+13 &lt; 750 +39
iren [92.7K]

Answer:

c = anything less than 14.1

Step-by-step explanation:

55c+13 < 750 + 39

55c+13 < 789

55c < 776

c < 14.1

Hope It Helps

5 0
2 years ago
Read 2 more answers
Sarah cuts a piece of rope that is 4.5 feet long.
icang [17]

Answer:

4.5 feet = 1.5 yards

Step-by-step explanation:

1 yard equals 3 feet

Then:

1 ----- 3

x -----4.5

x = 4.5/3 = 1.5 yards

Hope this helps

3 0
1 year ago
Question 6 of 15
umka2103 [35]

Answer:

LE=5\ units

Step-by-step explanation:

we know that

In a rectangle, the two diagonals are congruent and each diagonal bisects the other

so

LN=2KE ----> equation A

KE=LE -----> equation B

step 1

Find the value of x

solve equation A

LN=2KE

substitute the given values

(2x+2)=2(3x-7)

solve for x

2x+2=6x-14\\6x-2x=2+14\\4x=16\\x=4

step 2

Find the value of KE

KE=3x-7

substitute the value of x

KE=3(4)-7=5\ units

Remember that

KE=LE  -----> by each diagonal bisects the other

therefore

LE=5\ units

8 0
3 years ago
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