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mathematics UK Year 11 Mathematics (KS4)
 
Solved problems for the chapter:
 

Introduction to probability

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Detailed solution steps are available at:
 
https://en.openprof.com/wb/chapter:introduction_to_probability/5368/


Example 1.

Flo has a bag of counters. She picks a counter at random from the bag. The probability that she picks a green counter is 0.52. Work out the probability that she does not pick a green counter.
the problem is without solution steps    
Example 2.

On any day, the probability that the weather will be sunny is 0.7. Find the probability that on any day the weather will not be sunny.
the problem is without solution steps    
3.

A bag contains three colours of counters, green, pink and red.




There are three times as many pink counters as red counters. Complete the table.
the problem is without solution steps    
4.

Pryanka plays a game in which she can win, lose or draw. The table shows the probability of her winning or losing a game.




Complete the table.
the problem is without solution steps    
5.

A bag contains 6 red balls, 4 green balls and 2 blue balls. Zia takes a ball from the bag at random.




Write down the letter from the probability scale that shows the probability that Zia takes a green ball.
the problem is without solution steps    
6.

A bag contains 6 red balls, 4 green balls and 2 blue balls. Zia takes a ball from the bag at random.




Write down the letter from the probability scale that shows the probability that Zia takes a yellow ball
the problem is without solution steps    
7.

A bag contains 6 red balls, 4 green balls and 2 blue balls. Zia takes a ball from the bag at random.




Write down the letter from the probability scale that shows the probability that Zia does not take a blue ball.
the problem is without solution steps    
8.

How many heads can we expect if a coin is tossed times?

    

9.

We roll a dice times. What is the probability of getting:



  • even numbers

    
10.

We have tickets with numbers from to . What is the probability that we draw a ticket that is divisible by and not divisible by ?