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junior college 1 | H1 Maths
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Ken
Ken

junior college 1 chevron_right H1 Maths chevron_right Singapore

Probability

Date Posted: 1 year ago
Views: 272

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Boy Mow Chau
Boy Mow Chau's answer
316 answers (Tutor Details)
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For part (iii), may i know if the answer of 72/105 is from your teacher? Considering that 72/105 is more than 1/2, the probability seems too high, so is quite doubtful to be correct.

I am interpreting the question as saying that the group of 3 students consisting of chairperson, vice-chairperson & secretary, are standing in the center of the row, occupying the 3rd, 4th & 5th positions (in various order).

Another possible interpretation may be that either one of the 3 (chairperson, vice-chairperson or secretary) is standing at the exact center (4th position), but I feel that this is an incorrect interpretation.
Ken
Ken
1 year ago
Thank you