Number series
Q) 396, 462, 572, 427, 671, 264 | ||||||||
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Answer: Option B
Explanation:
In each number except 427, the middle digit is the sum of other two.
Time , Speed & Distance
Permutation &Combination
The number of ways in which candidates can be ranked if is always above is ?
Solution: 10C2 * 8!
= (10!/ 2! * 8! ) 8!
= 10!/ 2!
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