Aussie Maths & Science Teachers: Save your time with SmarterEd
Peter has a bag of marbles. 75% of his marbles are blue.
Peter takes a green marble from his bag and loses it in a game.
If he takes another marble from the bag without looking, what are the chances it is blue?
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less than 75% |
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equal to 75% |
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greater than 75% |
`text(greater than 75%)`
`text(There will be greater than 75% chance)`
`text(because there are the same amount of )`
`text(blue marbles to be chosen but 1 less)`
`text(in the bag.)`
Which number below represents an event that is certain to occur?
| `0.0` | `0.1` | `1.0` | `1.2` |
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`1.0`
`1.0`
The weatherman described the chance of thunderstorms on a given day as highly unlikely.
Which probability best describes the chance of a thunderstorm?
| `1/11` | `1/2` | `10/11` | `1` |
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`1/11`
`1/11`
Arun flips an unbiased coin 200 times.
Which result is most likely?
| `20\ text(tails)` | `98\ text(tails)` | `108\ text(tails)` | `196\ text(tails)` |
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`98\ text(tails)`
`text(The expected result is 100 tails.)`
`:.\ text(The most likely result is the one closest to 100 tails.)`
`=> 98\ text(tails)`
A bag contains 30 marbles that are either blue or green.
The probability of randomly removing a blue marble is 30%.
What is the probability of randomly removing a green marble?
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`text(70%)`
| `P(G)` | `= 1 – P(B)` |
| `= 1 – 0.3` | |
| `= 0.7` | |
| `= 70text(%)` |