Late to School?Trick brain teasers appear difficult at first, but they have a trick that makes them really easy.
Leong was returning to his school, Raffles Junior College, after the week-long September school holidays. However, it seems that he has yet to get used to waking up early.
On the first day, he was late for school but managed to be early the next two days. The next day, he was late again. On the day after that, it rained but he was on time. He was sick on the following day and stayed at home.
What is the probability of him reporting late for lessons at Raffles Junior College the next day?
HintReread and count slowly.
AnswerThe probability is 0%.
Monday - late
Tuesday - early
Wednesday - early
Thursday - late
Friday - on time
Saturday - stayed at home
Sunday - no lessons (The school is not even open!)
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