Cyflwyniad i Debygolrwydd

Tebygolrwydd
Probability

Hafaliad Tebygolrwydd:

Sawl ffordd y gall ddigwyddiad ddigwydd ÷ Nifer canlyniadau posibl



Probability Equation:

Number of ways the event can happen ÷ Number of possible outcomes

Multiple Choice

Beth yw'r tebygolrwydd o ddewis marblen goch?

What's the probability of choosing a red marble?

• 3/10

• 3/9

• 1/9

• 1/3

Multiple Choice

Beth yw'r tebygolrwydd o ddewis marblen binc?

What's the probability of choosing a pink counter?

• 2/9

• 2/10

• 1/3

• 1/4

Multiple Choice

Beth yw'r tebygolrwydd o ddewis pel felen neu ddu?

What's the probability of choosing a yellow or black ball?

• $$\frac{4}{12}$$
  

• $$\frac{5}{24}$$

• $$\frac{5}{12}$$

• $$5\%$$

Multiple Choice

Beth yw'r tebygolrwydd o droelli eilrif?

What is the probability of spinning an even number?

• $$\frac{1}{2}$$

• $$\frac{3}{10}$$

• $$\frac{4}{8}$$

• $$\frac{3}{8}$$

Multiple Choice

Beth yw'r tebygolrwydd o droelli rhif cysefin?

What is the probability of spinning a prime number?

• $$\frac{3}{4}$$

• $$\frac{7}{8}$$

• $$\frac{4}{5}$$

• $$\frac{3}{5}$$

Diagramau Venn | Venn Diagrams

Labelling

Llenwch y diagram Venn.

Fill the Venn diagram.

Drag labels to their correct position on the image

7

2

5

10

Multiple Choice

Sawl person sy'n chwarae pel-droed ond ddim yn wrestlo?

How many people play football but do not wrestle?

• 26

• 8

• 104

• 16

Multiple Choice

Beth yw cyfanswm pobl sy'n hoffi pel-droed?

What is the total amount of people that like Soccer ?

• 11

• 29

• 18

• 45

Multiple Choice

Ysgrifennwch y tebygolrwydd o ddewis siap coch.

Find the probability of getting a red shape.

• $$\frac{5}{9}$$

• $$\frac{3}{9}$$

• $$\frac{1}{3}$$