Elitmus Exam Numerical Ability Permutation and Combination

there are 23 chits numbered from 1 to 23. sonu pick up a chit and puts it back. monu picks another chit and puts it back. what is the probability that monu's chit number is greater than that of sonu's.

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Elitmus Other Question

Three numbers A,B,C are such that the difference between the highest and the second highest two-digit numbers formed by using two of A,B and C is 5.Also ,the smallest two two-digit numbers differ by 2.If B>A>C then what is the value of B?

(a)1 (b)6 (c)7 (d)8
i have scored
85=verbal
75=problem solving
74=quant
what are my chances.please help