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iogann1982 [59]
1 year ago
12

The expected activity time in PERT analysis is calculated as: the weighted average of a, m, and b, with m weighted 4 times as he

avily as a and b. the sum of the optimistic, pessimistic, and most likely times, divided by six. the simple average of the optimistic, pessimistic, and most likely times. the sum of the activity variances, divided by six. the sum of the optimistic, pessimistic, and most likely times.
Mathematics
1 answer:
maria [59]1 year ago
3 0

Answer:

\text{the weighted average of a, m, and b, with m weighted 4 times as heavily as a and b.}

Step-by-step explanation:

\text{The expected activity time in PERT analysis is calculated as:}

\mathbf{\dfrac{a+4m + b}{6}}

where;

\text{a = optimistic duration; }

\text{m = most likely duration and;}

\text{ b = pessimistic duration     from the above formula.}

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A game has 15 balls for each of the letters B, I, N, G, and O. The table shows the results of drawing balls 1,250 times.
Mariana [72]

Theoretically, each letter should have the same probability of occurring since there are 15 of each. There are 5 letters that can be drawn, so there is a total of 75 balls, and each letter has a probability \dfrac{15}{75}=\dfrac15 of being drawn.

This means one would expect a theoretical frequency of \dfrac{1250}5=250, i.e. any given letter should get drawn 250 times, which means the answer is D.

4 0
2 years ago
Dan is watching The Birds in his backyard. Of the birds he watches, 9. Of them,or 45%, are sparrows. How many birds are in his b
ra1l [238]

If 9 of the sparrows is 45% of the birds in the backyard, 9/x = 45/100.

Cross multiply to get 9 * 100 = 45x; simplified is 900 = 45x or 20.

This means that there are 20 birds in the backyard. You can check this by dividing 9/20 which equals 45%

5 0
2 years ago
The two-way frequency table below shows the preferred communication method of employees at a company, based on years of employme
Anna35 [415]

Answer:

The percentage of employees with 8 or more years at the company that reported that email is their preferred method of communication is 30.48%. I suppose there was a small typing mistake in option B.

Step-by-step explanation:

The proportion is the number of desired outcomes divided by the number of total outcomes.

The percentage is the proportion multiplied by 100.

In this question:

210 employees with 8 of more year.

Of those, 64 have the email as their preferred method of communication.

64/210 = 0.3048

0.3048*100 = 30.48%

The percentage of employees with 8 or more years at the company that reported that email is their preferred method of communication is 30.48%. I suppose there was a small typing mistake in option B.

3 0
2 years ago
Read 2 more answers
Solve for x, given the equation Square root of x plus 9 − 4 = 1.
finlep [7]

Remember that an extraneous solution of an equation is a solution that emerges from the algebraic process of solving the equation but is not a valid solution of the equation.

First, we are going to solve our equation algebraically:

Step 1 simplify the equation:

\sqrt{x} +9-4=1

\sqrt{x}+ 5=1

Step 2 subtract 5 from both sides of the equation:

\sqrt{x} +5-5=1-5

\sqrt{x} =-4

Step 3 square both sides of the equation:

\sqrt{x} ^2=(-4)^2

x=16

Next, we are going to replace our solution in our original equation and check if it is a valid solution:

\sqrt{x} +9-4=1

\sqrt{16} +5=1

4+5=1

9\neq 1

Since 9 is not equal to 1, x=16 is not valid solution of the equation; therefor it is an extraneous solution.

We can conclude that the correct answer is: x = 16, solution is extraneous

8 0
2 years ago
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PLEASE ANSWER FAST!!!!
xz_007 [3.2K]

Answer:

The answer is 24.

Step-by-step explanation:

5 0
2 years ago
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