10 Probability quiz 1

What is the probability value given to something that is certain to happen?

• 0.5

• 100

• 1

• 50:50

Answer explanation

The probability value for an event that is certain to happen is 1. This means there is a 100% chance of the event occurring, making '1' the correct choice.

What is the probability of something that can't possibly happen?

• 1

• 0.01

• never

• 0

Answer explanation

The probability of an event that cannot happen is always 0. This means it is impossible for that event to occur, making 0 the correct answer.

Something has a 20% chance of happening. What is another way of expressing this probability

• 5 x 4

• likely

• 0.2

Answer explanation

A 20% chance can be expressed as a decimal (0.2) or as a fraction (1/5). Both 0.2 and \frac{1}{5} represent the same probability, making them the correct answers.

What is the probability of an event that is equally likely to happen or not happen?

• 0

• 0.5

• 1

Answer explanation

The event is equally likely to occur or not occur, meaning there are two possible outcomes. Therefore, the probability of the event happening is 1 out of 2, which is represented as \(\frac{1}{2}\) or 0.5.

Who was a key person in the early development of the mathematics of Probability?

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Answer explanation

To simplify \( \frac{10}{12} \), divide both the numerator and denominator by their greatest common divisor, which is 2. This gives \( \frac{5}{6} \). Therefore, \( d = 6 \). The correct answer is 6.

What is 8% as a simplified fraction?

Mathematical Equivalence

OFF

Answer explanation

To convert \( \frac{3}{5} \) to a percentage, multiply by 100. \( \frac{3}{5} \times 100 = 60 \). The correct answer is 60%, which can also be written as 60 percent or sixty.

What is 30% as a simplified fraction?

Mathematical Equivalence

ON

Reorder the following situations from lowest probability (left) to highest probability (right)

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