GWD29-22

meckychen

Q22:

Four extra-large sandwiches of exactly the same size were ordered for m students, where m > 4.  Three of the sandwiches were evenly divided among the students.  Since 4 students did not want any of the fourth sandwich, it was evenly divided among the remaining students.  If Carol ate one piece from each of the four sandwiches, the amount of sandwich that she ate would be what fraction of a whole extra-large sandwich?



A.     (m+4)/m(m-4)

B.     (2m-4)/m(m-4)

C.(4m-4)/m(m-4)

D(4m-8)/m(m-4)

E(4m-12)/m(m-4)

Answer: E

How to calculate?

Thank you.

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meckychen

]Four extra-large sandwiches of exactly the same size were ordered for m students, where m > 4.  Three of the sandwiches were evenly divided among the students.  Since 4 students did not want any of the fourth sandwich, it was evenly divided among the remaining students.  If Carol ate one piece from each of the four sandwiches, the amount of sandwich that she ate would be what fraction of a whole extra-large sandwich?
A.     (m+4)/m(m-4)

B.     (2m-4)/m(m-4)

C.(4m-4)/m(m-4)

D(4m-8)/m(m-4)

E(4m-12)/m(m-4)

Answer: E?

meckychen

Can anyone help me?

meckychen

up

Jasonhere

up

fanyue007

分两步， 先考虑前3块SANWICH ， 每块M人分，每人就分到1/M  , 3块就是3*1/M   剩下一块是M-4个人分   每人1/(m-1)   加起来就可以了！

Weilli