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serious [3.7K]
3 years ago
6

You have determined the critical path in a CPM analysis. You would like to determine the probability of completing the project i

s a desired period of time. One of the activities on the critical path has an optimistic time of 5 minutes, a most likely time of 6, and a pessimistic time of 17. What is the variance estimate of this activity?
Mathematics
1 answer:
xxMikexx [17]3 years ago
5 0

Answer:

The variance estimate of this activity is 4.

Step-by-step explanation:

Given information: One of the activities on the critical path has

Optimistic time = 5 minutes

Most likely time = 6 minutes

Pessimistic time = 17 minutes

The variance estimate of a activity is

\sigma ^2=(\frac{t_p-t_o}{6})^2

where, t_p is pessimistic time of that activity and  t_o is optimistic time of that activity.

The variance estimate of the given activity is

\sigma ^2=(\frac{17-5}{6})^2

\sigma ^2=(\frac{12}{6})^2

\sigma ^2=2^2

\sigma ^2=4

Therefore the variance estimate of this activity is 4.

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BigorU [14]
Are you serious? oh well..

ok, draw a circle. devide the circle into 5 parts. color in 3 of the parts.

Now, draw 4 more of these.

Now, count the pieces.
4 0
3 years ago
X+2y + z = 4<br> 1. 4y - 3z = 1<br> y + 5z = 6
Feliz [49]

Answer:

The values of x = y = z = 1  

Step-by-step explanation:

Given three linear equation as ,

x + 2y + z = 4               .......a

     4y - 3z = 1               .......b

       y + 5z = 6             ........c

Now solve eq a and b first

   4y - 3z = 1   ×  5

    y + 5z = 6  ×  3

Or, 20y - 15z = 5

      3 y + 15z = 18

so ,(20y - 15) + (3y +15 ) = 5 +18

or,   23 y = 23  

∴           y = 1

Now put this y value in eq c

so , 1 + 5z = 6 ,

Or,       5z = 6-1 =5

∴            z = 1

Again put this y and z value in eq a

so, x + 2(1) + (1) = 4

Or,                x   = 4 -3

∴                   x = 1

Hence from the above solutions , the value of x = y =z = 1        Answer

4 0
3 years ago
Tell me which option is correct: (0,m) (b,0) (m,0) (0,b) which one of those
strojnjashka [21]

Answer:

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Search for questions & chapters

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Class 11

>>Physics

>>Units and Measurement

>>Errors in Measurement

>>You measure two quantities ...

Question

Bookmark

You measure two quantities as A=1.0m±0.2m, B=2.0m±0.2m. We should report correct value for

AB

as

Medium

Solution

verified

Verified by Toppr

Correct option is

D

1.4m±0.2m

Here, A=1.0m±0.2m, B=2.0m±0.2m

AB=(1.0m)(2.0m)=2.0m

2

AB

=

2.0m

=1.414m

Rounding off to two significant figures, we get

AB

=1.4m

AB

ΔAB

=

2

1

(

A

ΔA

+

B

ΔB

)=

2

1

(

1.0

0.2

+

2.0

0.2

)=

2

0.3

Δ

AB

=

2

0.3

×

AB

=

2

0.3

×1.414=0.212m

Rounding off to one significant figure, we get

Δ

AB

=0.2m

The correct value for

AB

is 1.4m±0.2m

8 0
3 years ago
What is the value of y enter your answer in the box <br><br> Y=
Rama09 [41]

Answer:

The value of y is 14.

Step-by-step explanation:

To find this, we first can replace the angle written as 2x with 50. Since the sides leading to that point are congruent, we know that they have the same angle.

Now given that fact, we can put the 2 - 50s along with the final angle and set equal to 180 (the measure of the combined angles in all triangles).

50 + 50 + 5y + 10 = 180

110 + 5y = 80

5y = 70

y = 14

4 0
3 years ago
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7 0
3 years ago
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