What will be the probability to form word NOTEBOOK by using letters B,E,K,N,O,O,O and T. If you have

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28 Jul 2021 Find the probability

What will be the probability to form word NOTEBOOK by using letters B,E,K,N,O,O,O and T. If you have to make arrangement of E,N,O and T first, after then you have to arrange B,K,O and O.

OPtion

1) 1/122
2) 1/266
3) 1/288
4) 1/166
5) 3/322
6) 1/323
7) 1/12
8) 1/222
9) 1/322
10) none of these

Solution

probability to form word NOTE from N,O,T,E is
1/4 *1/3 *1/2*1= 1/24
probability to form word BOOK from B,O,O,K is
1/4*2/3*1/2*1= 1/12


probability to form word NOTEBOOK by using letters B,E,K,N,O,O,O and T. If you have to make arrangement of E,N,O and T first, after then you have to arrange B,K,O and O. = (1/24)*(1/12) = 1/288

Correct Option: 3 Best Solution (0)