Q 2225156961.     The answers sheet of 5 engineering students can be checked by anyone of 8 professors. What is the probability that all the 5 answer sheets are checked by exactly 2 professors?

IBPS-PO 2017 Mock Mains
A

`20/2187`

B

`40//19683`

C

`105/4096`

D

`40/729`

E

None of these

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