Aussie Maths & Science Teachers: Save your time with SmarterEd
There are 10 balls, numbered from 1 to 10, in a basket.
Five balls are taken out of the basket, one at a time, and not replaced.
The first ball taken out is number 4.
Which of the following cannot happen?
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The second ball is odd. |
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The third ball is even. |
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The fourth ball is 7. |
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The fifth ball is 4. |
Kenny can choose one of the 4 bowls.
He picks one ball from the bowl without looking.
Which bowl gives him the best chance of picking a black ball?
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`text(The chance of choosing a black ball for each option are:)`
`text(Option 1:)\ \ 3/5`
`text(Option 2:)\ \ 2/6=1/3`
`text(Option 3:)\ \ 4/8=1/2`
`text(Option 4:)\ \ 5/10 = 1/2`
`=>\ text(Option 1 gives him the best chance.)`
Angelina takes 3 marbles out of the bag at the same time.
Which of these is impossible?
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2 striped marbles and 1 white marble. |
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2 white marbles and 1 grey marble. |
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2 grey marbles and 1 striped marble. |
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2 star marbles and 1 grey marble. |
A fish tank has 4 different types of fish in it.
Jacques takes 1 fish out of the fish tank
Which fish is he least likely to take?
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`text(The fish least likely is the one that has the fewest number.)`