IGCSE Probability from a Frequency Table

IGCSE Probability from a Frequency Table

RECAP: Angles in Polygons

Understand the meaning of Relative Frequency

Apply the 'AND' and 'OR' rules in probability

Multiple Choice

What is the nth term in Q2?

• 2n+3

• 3n+2

• 5n-2

• 5n+3

Multiple Choice

What is 43 x 2.5 ?

• 106

• 96

• 107.5

• 86.5

Fill in the Blanks

What is the Highest Common Factor of 27 and 63?

Multiple Choice

What do the interior angles in a Hexagon add up to?

• 4 x 180 = 720

• 5 x 180 = 900

• 6 x 180 = 1080

• 7 x 180 = 1260

Multiple Choice

What do the exterior angles in a Hexagon add up to?

• 4 x 180 = 720

• 5 x 180 = 900

• ALL EXTERIOR ANGLES ADD TO 360

• 7 x 180 = 1260

Multiple Choice

What do the INTERIOR angles in a Heptagon add up to?

• 4 x 180 = 720

• 5 x 180 = 900

• 6 x 180 = 1080

• 7 x 180 = 1260

Multiple Choice

What do the EXTERIOR angles in a Heptagon add up to?

• 4 x 180 = 720

• 5 x 180 = 900

• ALL EXTERIOR ANGLES ADD TO 360

• 7 x 180 = 1260

Fill in the Blanks

What do the INTERIOR angles in an Octagon add up to?

Fill in the Blanks

What do the EXTERIOR angles in an Octagon add up to?

Multiple Choice

The EXTERIOR angle of a regular polygon is  $45^o$   
How many sides does the polygon have?

•  $360\div45\ =\ 8$   
  

•  $360\ -\ 45=315$  

•  $180\div45=4$  

•  $6$  

Multiple Choice

The EXTERIOR angle of a regular polygon is  $18^o$   
How many sides does the polygon have?

•  $180\div18\ =\ 10$   
  

•  $360\ -\ 18=342$  

•  $360\div18=20$  

•  $15$  

Multiple Choice

The interior angle : exterior angle of a polygon are in the ratio 10:8  
What is the size of the exterior angle?

• 100  
  

• 80

• 180

• 8

Multiple Choice

The interior angle : exterior angle of a polygon are in the ratio 7:2  
What is the size of the exterior angle?

• 40

• 2

• 140

• 4

Fill in the Blanks

What is the probability that the next car to pass his house will be red?

Fill in the Blanks

What is the probability that the next car to pass his house will be blue?

Fill in the Blanks

What is the probability that the next car to pass his house will be not black?

Fill in the Blanks

On an average day, 3500 cars pass Fred’s house. Based on his results, how many of these 3500 would we expect to be silver?

Fill in the Blanks

What is the probability that the next pet into the vets is a dog?

Fill in the Blanks

What is the probability that the next pet into the vets is a hamster?

Fill in the Blanks

What is the probability that the next pet into the vets is a cat OR snake?

'OR' & 'AND'

Often in Probability questions you will see the words 'OR' or 'AND'

When we have independent events

OR means ADD!

AND means MULTIPLY!

Fill in the Blanks

What is the probability that the nail is 50mm OR 60 mm