Monday, 30 September 2013

Learn Techniques & Tips on Aptitude Tests – SLA Aptitude Skills Training Program in Chennai

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Let us look at a common aptitude query. There is a 4-character code, with 2 of them being letters and the other 2 are numbers. What will be the maximum number of attempts to arrive at the correct code if the code is case-sensitive.

Answer – 16,22,400 is the the maximum number of attempts needed.

Solution Analysis : There are 52 possible letters, a-z and A-Z, and 10 possible numbers 0-9. The 4 characters 2 letters and 2 numbers can be selected in 52*52*10 *10 ways. These 4 characters can be arranged in 4C2, 1.e six different ways. The number of unique patterns that can be formed by lining up 4 objects of which 2 are distinguished one way (i.e. they must be letters) and the other 2 are distinguished in one way (I.e they must be letters) and the other 2 are distinguished another way (I.e they must be numbers).

At SLA IT Employment Training Company they train you in technical and aptitudes skills. For more details visit SLA Aptitude Skills Training Program in Chennai or dial (91 44) 4200 5050/90.