Download Tebygolrwydd

Tebygolrwydd - Probability
Mae tebygolrwydd yn cael ei ddefnyddio pan gawn
sefyllfaoedd lle mae elfen o ansicrwydd yn perthyn iddynt.
Probability is used when we have situations in which there is an
element of uncertainty.
Ceir elfen o ansicrwydd pan gynhelir haparbrofion fel
taflu ceiniog, taflu dîs neu ddewis cardiau allan o becyn o
gardiau chwarae.
Uncertainty can be associated with random experiments such as
tossing a coin, throwing a die or dealing cards from a pack of
playing cards.
Gofod Sampl yw’r enw a roddir ar y set o’r holl
ganlyniadau posib mewn haparbrawf.
Sample Space is the set of all the possible outcomes of a
random experiment.
Enghreifftiau - Examples
Wrth daflu dîs cyffredin a chofnodi’r sgôr a geir, y gofod
sampl yw
S = {1, 2, 3, 4, 5, 6}
When throwing an ordinary die and noting the score, the sample
space is
S = {1, 2, 3, 4, 5, 6}
Wrth ddewis cerdyn o becyn o gardiau cyffredin a
chofnodi’r siwt, y gofod sampl yw
S = {calonau, clwbiau, diamwntiau, rhawiau}
If a card is dealt from an ordinary pack of playing cards, and the
suit is noted, the sample space would be
S = {hearts, clubs, diamonds, spades}
Wrth daflu dau ddîs cyffredin a chofnodi cyfanswm y
ddwy sgôr a geir, y gofod sampl yw
S = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
If two ordinary dice are thrown and the sum of the scores on
each die is noted, the sample space would be
S = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
Ymarfer/Exercise 3.1
Mathemateg -Ystadegaeth Uned S1 – CBAC
Mathematics Statistics Unit S1 - WJEC