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vesna_86 [32]
3 years ago
13

Suppose there are 15 different color crayons in a box. Each time one obtains a crayon, it is equally likely to be any of the 15

types. Compute the expected # of different colors that are obtained in a set of 5 crayons. (Hint: use indicator variables and linearity of expectation)
Mathematics
1 answer:
Alexus [3.1K]3 years ago
8 0

Answer:

4.38

Step-by-step explanation:

There 15 different color crayon in a box.

We will enumerate the crayon from 1 to 15

Let Xi be the indicator random variable for the event that the ith crayon is among the set of 5 crayon.

E[Xi] = Pr(at least one type i crayon is in the set of 5)

E[Xi] = 1 - Pr(no type i crayons are in the set of 5)

= 1 - (14/15)^5

The expected number of crayon is

E(summation of Xi for the 15 crayons where i = 1) = 25(1- (14/15)^5)

= 4.38

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Hello!
max2010maxim [7]
Let O be the point of intersection of diagonals.

Consider triangles FOE and EOD:
FO = OD,  ∠FOE = ∠EOD  and OE is a common side  ⇒ 
triangles FOE and EOD are congruent.

In congruent triangles all corresponding sides and are congruent  ⇒
EF = DE = 6
6 0
4 years ago
Which absolute value function has a graph that is wider than the parent function, f(x) = |x|, and is translated to the right 2 u
ELEN [110]

The required function -   h(x)=|x-2|

The parent function f(x)=|x|  is translated to the right 2 units.

We have to find which absolute value function has a graph that is wider than the parent function.

The parent function f(x)=|x|

with the vertex (0,0)

The parent function is translated to the right 2 units.  

Transformation to the right,

f(x)→f(x-b) , the graph of f(x) is shifted towards right by b unit.

Same as the graph f(x) is shifted towards the right by 2 units and forms a graph of h(x).

h(x)=|x-2|

 If the graph is wider than the parent function then the function must be in the form of,  

h(x)=K\times f(x)

Where the value of k must be less than or equal to 1. If k is more than 1 then the graph is compressed.

So, let it be k=1

Therefore, The required absolute value function is,  h(x)=|x-2|  

We plot the graph of both the equations in which translation is shown.

Refer to the attached graph below.

To learn more about the function visit:

brainly.com/question/25638609

#SPJ1

4 0
2 years ago
If sin X = 0.3240 and b = 40, what is the value of c
storchak [24]

Answer:

123.46 or 42.28

Step-by-step explanation:

Assuming that b is the leg side of a triangle and that c is the hypotenuse, we can solve for c using SOHCAHTOA.

We can find the angle from the equation sin X = 0.3240.

X = sin^{-1} 0.3240

X = ...

Through SOHCAHTOA, we know that we should use either sin X = \frac{opp}{hyp}  or that cos X = \frac{adj}{hyp}.

I'm going to assume that we use sin X = \frac{opp}{hyp} since we are given a length b and not a length a. So:

sin 18.9050 = \frac{40}{c}

c =  \frac{40}{sin 18.9050} = 123.46

If we use cos X = \frac{adj}{hyp}, then:

cos 18.9050 = \frac{40}{c}

c =  \frac{40}{cos 18.9050} = 42.28

Not sure which one is correct since we are not given a picture of the sides.

5 0
3 years ago
What's the answer to this
timofeeve [1]

Answer:

AC ≈ 17.3 , BC ≈ 5.3

Step-by-step explanation:

using the tangent ratio in right triangle ACD

tan51° = \frac{opposite}{adjacent} = \frac{AC}{AD} = \frac{AC}{14} ( multiply both sides by 14 )

14 × tan51° = AC , then

AC ≈ 17.3 ( to the nearest tenth )

using the cosine ratio in right triangle ABC

cos72° = \frac{adjacent}{hypotenuse} = \frac{BC}{AC} = \frac{BC}{17.3} ( multiply both sides by 17.3 )

17.3 × cos72° = BC , then

BC ≈ 5.3 ( to the nearest tenth )

5 0
2 years ago
A train left Apex at 12 P.M. and traveled for 3 hours and 5 minutes. It stopped for fuel for 10 minutes, and then continued towa
Alina [70]
It should be... 4:35
3 0
3 years ago
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