Number System
In how many different ways can 7 boys and 3 girls sit in a row such that all the three girls do not sit together ?

3186880
3086880
3386880
3286880

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Number System
A box contains 5 red, 4 black and 4 blue balls. If 3 balls are drawn randomly from the box, what is the probability that there are exactly 2 blue balls in the three drawn balls ?

27/143
29/145
28/144
30/146

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

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