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Wiskunde

Nog meetkunde, datahantering en waarskynlikheid

Opvoeders afdeling

Memorandum

20.3 (a) (i) ‘n half (een uit 2)

(ii) ‘n half (een uit 2)

(c) ‘n kwart (een uit 4)

(d) 2 uit 21

20.4 (a) een sesde (een uit 6)

20.5 ses uit 36 (een sesde)

22. KLAAR MET GRAAD SEWE SE WISKUNDE!

MODULETOETS 9

1. Kontroleer leerder se poging.

2. gly

3. (a) Net ‘n deel van die groep is ondervra om inligting te kry.

(b) Gaan oor moontlikheid dat iets sal gebeur of nie.

4. (a) 10

(b) 10

(c) 10,6

5. (a) prentgrafiek / pictogram

(b) Leerders is 6 jaar en ouer in Gr.1. / Niemand jonger as 6 jaar in die skool nie.

(c) 110

(d) 30

(e) 680

6.

7.4 4 uit 32 (een agste)

Leerders afdeling

Inhoud

Aktiwiteit: waarskynlikheid [lu 5.10, lu 5.9]

20. WAARSKYNLIKHEID

20.1 Klasbespreking

a) Wat is die kans dat jy Graad 7 sal slaag?

b) Wat is die kanse dat dit vandag sal reën?

c) Wat is jul sportspan (enige sport) se kans om die volgende wedstryd te wen?

d) Wat is jou kans om die Lotto te wen?

e) Wat is die kans dat jy eendag op die maan sal loop?

20.2.1 Het jy geweet?

In bogenoemde gevalle het jul eintlik geskat wat die waarskynlikheid is dat iets sal gebeur of nie sal gebeur nie.

20.2.2 Het jy ook geweet?

Waarskynlikheid strek vanaf “ geen kans ” dat iets sal gebeur nie tot “ dit sal beslis gebeur ”.

’n Waarskynlikheid van 0 beteken dat die gebeurtenis nooit sal plaasvind nie.

’n Waarskynlikheid van 1 beteken die gebeurtenis sal beslis plaasvind.

20.2.3 BELANGRIK om te WEET:

Die waarskynlikheid dat iets sal plaasvind, is:

Die aantal kere wat dit kan plaasvind

Totale aantal moontlikhede

Hoe nader jou antwoord aan 1 is, hoe groter is die waarskynlikheid dat die gebeurtenis sal plaasvind.

20.3 Werk saam met ’n maat en beantwoord die volgende vrae:

a) Jy skiet ’n munstuk in die lug op. Wat is die waarskynlikheid dat dit sal val met:

i) munt bo? ________________________

ii) kruis bo? _________________________

b) Skiet ’n munstuk 50 keer in die lug op. Jou maat kan jou help rekord hou van watter kant elke keer bo land.

i) Voltooi die tabel

Munt Kruis
Waarskynlikheid
Munt Kruis
Bv. 4 6 4 10 size 12{ { { size 8{4} } over { size 8{"10"} } } } {} 6 10 size 12{ { { size 8{6} } over { size 8{"10"} } } } {}
Eerste 10 gooie: ............. ............. ............. .............
Tweede 10 gooie: ............. ............. ............. .............
Derde 10 gooie: ............. ............. ............. .............
Vierde 10 gooie: ............. ............. ............. .............
Vyfde 10 gooie: ............. ............. ............. .............

ii) Wat is die gemiddelde van jou gooie vir:

a) munt: _______________________

a) kruis: ________________________

c) Wat is die waarskynlikheid dat beide muntstukke met die muntkant bo sal val as jy twee munte gelyktydig opskiet?

_____________________________________________________________________

d) ’n Deelnemer aan die Lotto moet ’n blou bal uit die houer haal om ’n prys te wen. As daar 19 pienk balle en 2 blou balle in die houer is, wat is die waarskynlikheid dat die deelnemer ’n prys sal wen?

_____________________________________________________________________

20.4 Werk nou op jou eie. Jy benodig ’n dobbelsteen.

a) Wat is die waarskynlikheid dat ’n dobbelsteen met die 3 na bo sal val as jy dit gooi? _____________________________________________________________________

Questions & Answers

what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Wiskunde graad 7. OpenStax CNX. Oct 21, 2009 Download for free at http://cnx.org/content/col11076/1.2
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