HKCEE 1981 No. 14 A group consists of n boys and n girls. Iftwoof the girls are exceeded by two other boys, then 51% of the group memberswill be boys. What is n?ANS:100
How can I find the answer?
Thanks!
Maths Question
2011-12-15 7:12 am
回答 (2)
2011-12-15 7:16 am
✔ 最佳答案
Let the new no. of girl are n - 2, then the no. of boys becomes n + 2So, (n + 2)/2n = 51%
n + 2 = 1.02n
0.02n = 2
n = 100
2011-12-15 7:20 am
Why the new no. of girl are n - 2 ?
收錄日期: 2021-04-26 19:16:33
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