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secondary 4 | E Maths
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hi i need help with this question. thank you!
Date Posted: 4 years ago
Views: 297
To get to Q, there are several cases to consider.
1. Not moved, not moved, moved 2.
2. Not moved, moved 2, not moved.
3. Moved 2, not moved, not moved.
4. Moved 2, moved 1, moved 1 back
5. Moved 2, moved 1 back, moved 1.
6. Not moved, moved 1, moved 1.
7. Moved 1, not moved, moved 1.
8. Moved 1, moved 1, not moved.
9. Moved 1 back, moved 1, moved 2.
10. Moved 1 back, moved 2, moved 1.
11. Moved 1, moved 2, moved 1 back.
12. Moved 1, moved 1 back, moved 2.
Not sure if I missed out any.
1. Not moved, not moved, moved 2.
2. Not moved, moved 2, not moved.
3. Moved 2, not moved, not moved.
4. Moved 2, moved 1, moved 1 back
5. Moved 2, moved 1 back, moved 1.
6. Not moved, moved 1, moved 1.
7. Moved 1, not moved, moved 1.
8. Moved 1, moved 1, not moved.
9. Moved 1 back, moved 1, moved 2.
10. Moved 1 back, moved 2, moved 1.
11. Moved 1, moved 2, moved 1 back.
12. Moved 1, moved 1 back, moved 2.
Not sure if I missed out any.
1. Prob = 1/6 x 1/6 x 1/6
2. Prob = 1/6 x 1/6 x 1/6
3. Prob = 1/6 x 1/6 x 1/6
4. Prob = 1/6 x 2/6 x 2/6
5. Prob = 1/6 x 2/6 x 2/6
6. Prob = 1/6 x 2/6 x 2/6
7. Prob = 2/6 x 1/6 x 2/6
8. Prob = 2/6 x 2/6 x 1/6
9. Prob = 2/6 x 2/6 x 1/6
10. Prob = 2/6 x 1/6 x 2/6
11. Prob = 2/6 x 1/6 x 2/6
12 . Prob = 2/6 x 2/6 x 1/6
2. Prob = 1/6 x 1/6 x 1/6
3. Prob = 1/6 x 1/6 x 1/6
4. Prob = 1/6 x 2/6 x 2/6
5. Prob = 1/6 x 2/6 x 2/6
6. Prob = 1/6 x 2/6 x 2/6
7. Prob = 2/6 x 1/6 x 2/6
8. Prob = 2/6 x 2/6 x 1/6
9. Prob = 2/6 x 2/6 x 1/6
10. Prob = 2/6 x 1/6 x 2/6
11. Prob = 2/6 x 1/6 x 2/6
12 . Prob = 2/6 x 2/6 x 1/6
Sum of all probs =
1/216 + 1/216 + 1/216
+ 4/216 + 4/216 + 4/216
+ 4/216 + 4/216 + 4/216
+ 4/216 + 4/216 + 4/216
= 39/216
= 13/72
1/216 + 1/216 + 1/216
+ 4/216 + 4/216 + 4/216
+ 4/216 + 4/216 + 4/216
+ 4/216 + 4/216 + 4/216
= 39/216
= 13/72
See 1 Answer
done
2 Upvotes
clear 0 Downvotes
This should make it easier to visualise. Let me know if my workings are still too complicated.
Date Posted:
4 years ago
ah i see it now, thank you so much!
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