Total number of notepad = 900
Divided in 20 students
Each student contains notepads = 900/20 = 45 note pads
Total number of laptop collected by 8 student = 8 * 45 = 360
1//3 of laptop received by 8 student delivered to remaining 12 students = 360 x 1/3 = 120 No
Now total student = 20
Remaining student = 20- 8 = 12
Additional notepad for each student = 120/12 = 10
so total number of note pad = 900
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20% upvoted since you replied the fastest with correct answer. But your working shouldn't start with 900, which is the answer.
The 5% will be given to @fireddd as a consolation for the correct working
You are absolutely right. It should not started with the answer. @fireddd certainly deserve more. Keep sharing @larryphang
👍🏼
Fair play