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secondary 4 | A Maths
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I don’t understand y u have to times it by 6
Date Posted: 1 year ago
Views: 197
Have to multiply by 6 because the 3 numbers can appear in 6 different ways ...
123
132
213
231
312
321
Alternatively, you can consider the probability of each of the cases above, then add the probabilities together ...
3/6 x 2/6 x 1/6 +
3/6 x 1/6 x 2/6 +
2/6 x 3/6 x 1/6 +
2/6 x 1/6 x 3/6 +
1/6 x 3/6 x 2/6 +
1/6 x 2/6 x 3/6
= 3/6 x 2/6 x 1/6 x 6
Notice that the probability of each case is equal, so it is equivalent to calculating the probability of one case times it by 6.
123
132
213
231
312
321
Alternatively, you can consider the probability of each of the cases above, then add the probabilities together ...
3/6 x 2/6 x 1/6 +
3/6 x 1/6 x 2/6 +
2/6 x 3/6 x 1/6 +
2/6 x 1/6 x 3/6 +
1/6 x 3/6 x 2/6 +
1/6 x 2/6 x 3/6
= 3/6 x 2/6 x 1/6 x 6
Notice that the probability of each case is equal, so it is equivalent to calculating the probability of one case times it by 6.
See 1 Answer
done
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Hi, Clara. I hope it helps.
Date Posted:
1 year ago
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