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Ted Olson, director of the company Overnight Delivery, is worried because of the number of letters...

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Basic Math

Ted Olson, director of the company Overnight Delivery,is worried because of the number of letters of first class that hiscompany has lost. These letters are transported in airplanes andtrucks, due to that, mister Olson has classified the lost lettersduring the last two years according to the transport in which theletters were lost. The data is as follows:

Number of cards lost in (month)

J

F

M

A

M

J

J

A

S

O

N

D

Truck

4

5

2

3

2

1

3

5

4

7

0

1

Airplane

5

6

0

2

1

3

4

2

4

7

4

0

Mister Olson will investigate only one department,either aerial o ground department, but not both. He will open theinvestigation in the department which has the most number of lostletters per month, find:

23.- The expectation value of lost letters per month intruck.

24.- The expectation value of lost letters per month inairplane.

Answer & Explanation Solved by verified expert
4.2 Ratings (655 Votes)

(23)

The Expectation value of lost letters per month in truck = Sum of lost letters in truck/12

                                                                                 = (4 +5 + 2 + 3 + 2 + 1+ 3 +5 + 4 + 7 + 0 + 1)/12

                                                                                  = 37/12 = 3.0833

So,

Answer is:

3.0833

(24)

The Expectation value of lost letters per month in airplane = Sum of lost letters in airplane/12

                                                                                 = (5 + 6 + 0+ 2 + 1 + 3 + 4 + 2 + 4 +7 +4 +0)/12

                                                                                  = 38/12 = 3.1667

So,

Answer is:

3.1667

     

                                                                               -
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