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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

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Hajah Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
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Victoria Reply
HOW CAN MAN ORGAN FUNCTION
Alfred Reply
the diagram of the digestive system
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allimentary cannel
Ogenrwot
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William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
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Josephine Reply
Genetics is the study of heredity
Misack
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Misack
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Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
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Yousuf Reply
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza 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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