Someone selects a question from the exercises in Longman NSS Mathematics In Action 4B.
What is the probability that he/she selects a question with diamond sign?
Probality
2011-05-21 7:05 am
回答 (3)
2011-05-28 10:47 pm
✔ 最佳答案
It is not difficult indeed but very time consuming.
1) Count the total no. of questions in this textbook, including all Class Practices and Supplementary Exercises ( N1 ).
2) Count the total no. of questions with diamond sign as appeared in this textbook ( N2 ).
3) P( Question with diamond sign )
= ( Total no. of questions with diamond sign as appeared ) / ( Total no. of questions in this textbook )
= N2 / N1
4) It is time consuming for you need to count by yourself one by one. The calculation is easy indeed.
Hope I can help you.
參考: Mathematics Teacher Mr. Ip
2011-05-21 10:03 pm
Count the total no. of questions in your book
Count the total no. of questions with diamond sign
P(question with diamond sign) = (total no. of questions with diamond sign) / (total no. of questions in your book)
Count the total no. of questions with diamond sign
P(question with diamond sign) = (total no. of questions with diamond sign) / (total no. of questions in your book)
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