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JSS2: MATHEMATICS - 3RD TERM

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  1. Scale Drawing | Week 1
    3 Topics
    |
    1 Quiz
  2. Angles of Elevation & Depression | Week 2
    3 Topics
    |
    1 Quiz
  3. Pythagoras’ Theorem I | Week 3
    3 Topics
    |
    1 Quiz
  4. Pythagoras’ Theorem II | Week 4
    2 Topics
    |
    1 Quiz
  5. Area and Volume of Cones and Cylinders | Week 5
    3 Topics
    |
    1 Quiz
  6. Cones | Week 6
    3 Topics
    |
    1 Quiz
  7. Bearings and Distances I | Week 7
    2 Topics
    |
    1 Quiz
  8. Bearings and Distances II | Week 8
    2 Topics
    |
    1 Quiz
  9. Presentation of Data | Week 9
    6 Topics
    |
    1 Quiz
  10. Probability | Week 10
    6 Topics
    |
    1 Quiz



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Topic Content:

  • Equally Likely Outcomes

The probability that an event will happen is written as: 

Probability = \( \normalsize \frac{Number\:of\:successful\:outcomes}{Total \: number\:of\:possible\:outcomes} \)

Provided that the outcomes of an event are equally likely i.e. the outcomes have an equal chance of occurring.

Random: This means without aim or chance in an unbiased way. 

Note: Use the multiplication law when a question contains the word “and” or “both/and”.

Example 10.3.1:

A fair dice is thrown once. Write the probability of getting:

(a) A four 
(b) An odd number 
(c) A number less than 4 
(d) Factors of 2 
(e) A prime number 

Solution 

Sample space or possible outcomes = 1, 2, 3, 4, 5, 6

Total possible outcomes = 6 

Probability = \( \frac{Number\:of\:successful\:outcomes}{Number\:of\:possible\:outcomes} \)

(a) Getting a 4, 

 

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