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The chance of an event to happen is called a probability. An event can be simple or compound.
The probability of an event P (E) can be determined by two factors:
- number of times an event happens (N)
- total number of possible outcomes (O)
Mathematically, P (E) = N/O
P (E) can also be represented using a line called probability line. In a probability line, 0 represents an impossible event while 1 represents a certain event. P(E) can only occur between 0 and 1.
Probability can also be expressed as a fraction, as a decimal and as a percentage.
I’m tossing a coin! What is the probability that the coin lands on tail?
Since the coin can only land on tail, N = 1. There are two possible outcomes (coin landing on heads or on tail), so O = 2.
Hence, P (E) is ½ or 0.5 or 50%.
Understanding the probabilities of Simple and Compound events Worksheets
This is a fantastic bundle which includes everything you need to know about the probabilities of Simple events and Compound events Worksheets across 15+ in-depth pages. These are ready-to-use Common core aligned Grade 7 Math worksheets.
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