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  4. There are 10 true-false questions in an examination. Then, these questions can be answered in

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Q. There are 10 true-false questions in an examination. Then, these questions can be answered in

Permutations and Combinations

Solution:

$\because$ Each true-false question can be answered in 2 ways.
$\therefore$ Number of ways in which 10 questions can be answered
$=2^{10}=1024$