6 boys and 6 girls sit in a row at random. The probability that all the girls sit together is
If all the girls sit together, then consider it as 1 group.

Total number of persons = 6 + 1 = 7 persons
∴ Total number of arrangements in a row of 7 persons = 7!
and the girls interchanges their seats in 6! ways.
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Hence, the correct option is (C).
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Generated by AI. May contain inaccuracies — always verify with your textbook.