MHB How Do I Correctly Subtract All Black Hands in Part (d)?

  • Thread starter Thread starter Micky1964
  • Start date Start date
AI Thread Summary
In part (d), the user realizes their error in subtracting the "all black" hands without also accounting for the "all red" hands. They acknowledge that subtracting only the black hands leaves the total still including the red hands. This oversight highlights the importance of considering all relevant categories when performing such calculations. The user expresses a sense of clarity after receiving feedback on their mistake. Correctly subtracting both categories is essential for accurate results.
Micky1964
Messages
4
Reaction score
0
Can someone tell me where I'm going wrong here in part (d)?

Screen Shot 2021-09-25 at 8.01.10 pm.png

Answers from textbook:
Screen Shot 2021-09-25 at 8.01.28 pm.png

My attempt:
IMG_2935.JPG

Apologies for the blurry photo.
 
Mathematics news on Phys.org
Someone just pointed out to me my rather obvious mistake...When I subtract the 65780 "all black" hands, the rest of the hands will also still include the 65780 "all red" hands, so I should subtract those as well.
Funny how these things seem obvious in hindsight.
 
Thread 'Video on imaginary numbers and some queries'

Thread 'Video on imaginary numbers and some queries'

Hi, I was watching the following video. I found some points confusing. Could you please help me to understand the gaps? Thanks, in advance! Question 1: Around 4:22, the video says the following. So for those mathematicians, negative numbers didn't exist. You could subtract, that is find the difference between two positive quantities, but you couldn't have a negative answer or negative coefficients. Mathematicians were so averse to negative numbers that there was no single quadratic...
View full post »

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »
Thread 'Unit Circle Double Angle Derivations'

Thread 'Unit Circle Double Angle Derivations'

Here I made a terrible mistake of assuming this to be an equilateral triangle and set 2sinx=1 => x=pi/6. Although this did derive the double angle formulas it also led into a terrible mess trying to find all the combinations of sides. I must have been tired and just assumed 6x=180 and 2sinx=1. By that time, I was so mindset that I nearly scolded a person for even saying 90-x. I wonder if this is a case of biased observation that seeks to dis credit me like Jesus of Nazareth since in reality...
View full post »

Similar threads

MHB Subtracting mixed fractions help
Replies
1
Views
1K
B Tips on developing and improving number sense and basic math skills
Replies
13
Views
2K
I How to convince someone that an event repeating an infinite number of times does not guarantee every outcome?
Replies
23
Views
2K
MHB Fourier Series involving Hyperbolic Functions
Replies
9
Views
4K
Complex numbers problem |z| - iz = 1-2i
Replies
20
Views
2K
MHB Solving Uncertainties: Explaining My Mistakes
Replies
3
Views
3K
I Why does the cross product operation adhere to the right-hand rule?
Replies
8
Views
2K
MHB Is this a valid method for selecting a Simple Random Sample?
Replies
5
Views
11K
I Multivariable optimization problem
Replies
6
Views
2K
Is My Solution for Part D Logically Correct?
Replies
7
Views
2K

Hot Threads

Recent Insights

Back
Top