AP EAMCET · Maths · Permutation Combination
The number of different signals which can be given from 7 different coloured sheets, taking one or more at a time is
- A 127
- B 5913
- C 13699
- D 13700
Answer & Solution
Correct Answer
(C) 13699
Step-by-step Solution
Detailed explanation
\(N = 7\) Number of signals \( = 2^N - 1 \) \( = 2^7 - 1 \) \( = 128 - 1 = 127 \)
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