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Any help with this would be aprreciated]]>

A child has a sister. Sister got the results back and she is negative on the bad gene - she doesent have it.

What does that mean for the child? Is the probobility the child has a crooked gene 25% or is it still 50%??

Also one more similar question of the same type of problem I think: if one plays a roulette (and lets omitt the...

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Alan: Bob ate at least four cookies.

Bob: I didn't! I ate fewer than four cookies!

Cheryl: Well, Bob ate at least one cookie.

If exactly one of these statements is true, how many cookies did Bob eat?

]]>

Rectangular planks are sold by the piece, which you are tasked with covering a floor of a room with. These planks come in the same dimensions and can be cut down to any shape, but any pieces that you cut can only have one of the pieces placed on the floor, so if you cut a plank in half or some other shape, you can only lay one-half piece from that plank, and then you will have to throw away the rest and use another plank piece to cover another part of the floor...

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20 workers per day work = 1/30

x/30 + 15 workers per day work * (35-x)= 1

(x + 1050 * 15 workers per day work - 30 * 15 workers per day work * x ) /30 =1

x +15 workers per day work * (1050 - 30x) = 30

per day work of 20 workers= 1/30

per day work of 1worker = 1/(30 * 20)= 1/60

per day work of 15 workers =...

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(Volume filled per hour - volume leaked per hour)* 6 = volume of cistern.

From here leaked per hour I will find out then ,

leaked per hour * total time taken for empty = volume of cistern

Volume of cistern= any volume assume then 30 hours .

I have assumed that inlet is much faster than leaked but can...

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1 men is working for 1920 hr to complete work.

(80 hrs) 10 days = 1 work

24 men in 8 hrs= 1/80 work

1 man in 1 day (8hr) = 1/1920 work

1 man in 1 day(1hr)= 1/(1920* 8)

1 man in 1 day(10hr )= 1/1536 of work

(x* 1/1536) * 60= 1

x= 1536/60= 25

Where am I wrong?]]>

Thanks a lot for you help!

I'm building a financial app and I need some help with making a "distribution coefficient/index" (best math name I could give it ). The idea behind it is:

- There's a total balance. Let's call it "X".

- There are users with different shares at stake on "X": A, B, C and D (users).

- Each user has a % allocation depending on how much they have at stake on "X". Let's say:

- A --> 10 units --> 10%

- B --> 20 units --> 20%

-...

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I got to the point of doing

dv/dt(mv^2-mv0^2) = dv/dt(kx0^2-kx^2)

Is that right? How do I do it?]]>

This is how I tried to solve it:

I failed badly. How do I do this?]]>

The half life of C is about 5730 years, during which it (beta) decays into "N". In nature, about one atom in a million carbon atoms will be Carbon 14. A living organism constantly ingests carbon from its surrounding environment (and egests it back), so while alive the ratio C/C in the organisms remains at about the same as the...

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This is the problem.

I didn't know how to even try to solve this, so there won't be any attempt pictures this time. This is how the solution has it solved... Why x<2 and x>2???

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Wa = Work Done per day by ajay

Wv =Work Done ,, by vijay

Ws= Work Done by sanjay

(Wa + Wv) * x1 = 19/23

(Wv + Ws) * x2 = 8/23

Total work they're doing = 27/ 23 which is over 1 whole work ? 1 work = 23/23

Give some hint ?]]>

Its been about 15 years since I've been in a math class, so my apologies for this dumb question. But how do I figure out the number of combinations, for example?

I have 7 categories and 10 items in each category. What would be the total amount of combinations possible?

would it be 7 x 10 x 10 x 10 x 10 x 10 x 10 x 10

?

appreciate the help]]>

The window in the photo below is composed of right-angle triangles. But the triangle on the perpendicular wall, a result of light pouring through the right pane of the window, is an isoceles triangle. How is this possible? Many thanks!

View attachment 29187]]>

Hi,

I do not know how to start the above question. Can someone give me some pointers?

The answer is 11

Thanks,

Chris]]>