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The number of signals that can be sent by 6 flags of different colours taking one or more at a time is(a) 63(b) 1956(c) 720(d) 21 |
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Answer» The number of signals that can be sent by 6 flags of different colours taking one or more at a time is (a) 63 (b) 1956 (c) 720 (d) 21 |
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