It is the union of everything that is not c and everything that is in d. The p(cnd) section is included because it is in d. The union of X and Y means include everything in X and everything in Y. I hope that makes sense!
i'm doing gcse statistics and these topics actually come up in my stats exams, but i am not sure where to draw the line between GCSE and A Level ! Could you do some videos on statistics?
Thank you sm
Goodlock for tomorrow.
For the second question, part b, why did you include the p(cnd)? wouldn't that include C? shouldn't it be 0.7?
It is the union of everything that is not c and everything that is in d. The p(cnd) section is included because it is in d.
The union of X and Y means include everything in X and everything in Y.
I hope that makes sense!
I had the same question. Thanks for asking
@@mathsgenie7808 ok cool. thanks for replying.
Quick question, where did you get the formulas from at 6:00 and 8:35? Thank you for the video! :)
At 6:00, he rearranged the first formula to get the subject and at 8:35 he rearranged the second formula
i'm doing gcse statistics and these topics actually come up in my stats exams, but i am not sure where to draw the line between GCSE and A Level ! Could you do some videos on statistics?
Is this for gcse too?
No this is an a level video