Number System
There are seven boys and four girls in a row. In how many ways can they be seated in the row so that all the girls do not sit together ?

11! - 8! x 4!
10! - 7! x 3!
11! - 7! x 4!
11! - 8! x 3!

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Number System
What is a two-digit number if the ratio of the digit at ten's place to the digit at unit's place is 4 : 3 ? (I) The sum of the digits of a two-digit number is 14. (II) The digit at unit place is 75% o

If the data in statement (I) alone is sufficient to answer the question while that in statement (II) alone is not sufficient.
If the data in statement (II) alone is sufficient to answer the question, while that in statement (I) alone is not sufficient.
If the data even in both statements (I) and (II) together is not sufficient to answer the question.
If the data either in statement (I) alone or in statement (II) alone is sufficient to answer the question.

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