PROBABILITY: Question Preview (ID: 19665)


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You roll a dice. What is the probability of rolling anumber greater than 4? Give your answers as fractions.
a) 2/6 b) 3/6 c) non one d) 4/6
Calculate these probabilities. Give your answers as fractions. a A jar contains six green marbles and nine blue marbles.A marble is picked at random.What is the probability it will be green?
a) 4/15 b) 6/15 c) 9/15 d) 15/15
Clive is bored and is throwing rolled-up balls of paper at the recycling bin. He decides to fi nd the probability of a ball landing in the bin. He carries out an experiment. He has 20 throws. Five balls land in the bin.
a) 5% b) 20% c) 25% d) non one
A scientist checks some trees to see whether they are infected with a disease. She checks 28 trees, and 5 of them are infected. Estimate the probability that a tree chosen at random has the disease.
a) 0,12 b) 2 c) 0.53 d) 0.66
The probability of a football team winning a game is 0.3. What is the probability that they will not win the game?
a) 1 b) 4 c) 0.7 d) 0.3
There is a 45% chance of snow tonight. What is the probability that it will not snow?
a) 100% b) 30% c) 45% d) 55%
Sally puts tickets numbered 1–100 into a bag. She picks one out at random. Say which word from the list above you would use to describe each of the following events. a) The number is less than 90.
a) imposible b) certain c) Likely d) An evens chance
Sally puts tickets numbered 1–100 into a bag. She picks one out at random. Say which word from the list above you would use to describe each of the following events. The number is 0.
a) Impossible b) Certain c) Unlikely d) An evens chance
A die is rolled; find the probability of getting an odd number.
a) 3 b) 0.5 c) 5 d) 6
A die is rolled; find the probability of getting an even number
a) 0.5 b) 3 c) 6 d) 5
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