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3 years ago

10

The number of tacks in a 12oz box is normally distributed with a mean of 55 tacks and a standard deviation of 3 tacks. Suppose t

hat 600 different 12oz boxes are in a warehouse. About how many boxes contain less than 52 nails?
96
408
78
204

1 answer:

igor_vitrenko [27]3 years ago

8 0

I believe the answer is 408

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A coin is tossed 15 times the result was 9 heads and 6 tails what is the theoretical probability of tails

bagirrra123 [75]

Answer:

50% chance because there is 2 sides heads and Tails so u have a 50% chance of heads and 50% chance of Tails

3 0

3 years ago

Tim must read 2 books from a list of 7 recommended books for his summer reading program. In how many different ways can Tim choo

Marianna [84]

There are 21 ways Tim choose 2 books from the 7 recommended book

<em><u>Solution:</u></em>

Given that Tim must read 2 books from a list of 7 recommended books for his summer reading program

To find: different ways can Tim choose 2 books from the 7 recommended books

This is a combination problem

A combination is a selection of all or part of a set of objects, without regard to the order in which objects are selected

<em><u>The formula for combinations is:</u></em>

$n C_{r}=\frac{n !}{r !(n-r) !}$

where n represents the number of items, and r represents the number of items being chosen at a time

Here we have to choose 2 books from 7 books

Therefore, n = 7 and r = 2

<em><u>Substituting values in above formula, we get</u></em>

$\begin{aligned}&7 C_{2}=\frac{7 !}{2 !(7-2) !}\\\\&7 C_{2}=\frac{7 !}{2 ! \times 5 !}\end{aligned}$

For a number n, the factorial of n can be written as,

$n !=n \times(n-1) \times(n-2) \dots \dots \times 2 \times 1$

Therefore, we get

$7 C_{2}=\frac{7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{2 \times 1 \times 5 \times 4 \times 3 \times 2 \times 1}\\\\7C_2 = 7 \times 3 = 21$

Thus there are 21 ways Tim choose 2 books from the 7 recommended book

7 0

3 years ago

I need help on this

sveticcg [70]

Add 32 and 1,200 then subtract your answer with 15. Then that is your answer

3 0

3 years ago

If Julie needs 3 and 1/4 cups of oatmeal how many 1/4 cups of oatmeal will she use

Effectus [21]

Answer:

She will use 13 quarter cups of oatmeal

Step-by-step explanation:

3 1/4 = 13/4

x/4 = 13/4

4(x/4) = 4(13/4)

x = 13

3 0

3 years ago

It is 70cm long and has a circumference of 40cm what is the radius

Aleksandr [31]

The legnth is irrelivant

we know that
Circumference=2 times pi time radius

c=40
40=2 times pi times radius
divide both sides by 2
20=pi times radius
divide both sides b pi
20/pi=radius

the radius is 20/pi cm or aproximately 6.366199048 cm

4 0

3 years ago