1.

There are 6 multiple choice questions in an examination. How many sequences of answers are possible, if the first three questions have 4 choices each and the next three have 5 choices each?

Answer»

Each of the first three questions can be answered in 4 ways and each of the next three questions can be answered in 5 different ways.
Hence, the required number of different sequences of answers = 4 × 4 × 4 × 5 × 5 × 5 = 8000.



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