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# Permutation Combination for eLitmus | eLitmus Aptitude Questions

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 1 How many 4 digit can be formed by using 2,3,4,5,6,7 only once divisible by 25remember only once* divisible by A. 40 B. 12 C. 20 D. 24
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Explanation

If number is to be divisible by 25, it should be ended with {25,50,75,100)...
So here, the numbers should end with (25 nd 75)

if we take the no. to be ended with 25, the possibities are 4!/2= 24/2= 12

if we take the no. to be ended with 75, the possibities are 4!/2= 24/2= 12

so 12+12=24

 2 There are 10 Letter and correspondingly 10 different Address if the letter are put into envelope randomly then find the Probability that Exactly 9 letter will at the Correct Address?? A. 0 B. 1/10 C. 2/10 D. 3/10
See Answer & Explanation Lets Discuss
Explanation

zero because if 9 letters are in correct address then the 10th letter will be automatically in correct address

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## Permutation Combination for eLitmus | eLitmus Questions

Permutation and Combination Questions for eLitmus, eLitmus Permutation Combination Questions for pH Test elitmus Aptitude Questions, pH Test Aptitude Questions

## eLitmus Permutation Combination Questions

eLitmus Permutation Combination Questions, Every pH Test paper has atleast 1 question from Permutation and Combination which can be really easy to solve if you have practised these Permutation Combination Questions for eLitmus well.