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Q.

The number of integers, greater than 7000 that can be formed, using the digits 3, 5, 6, 7, 8
without repetition, is

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a

48

b

120

c

168

d

220

answer is C.

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Detailed Solution

detailed_solution_thumbnail

Given digits are 3, 5, 6, 7, 8
i) Four digits numbers starts with 7, 8

Question Image

 

 

 

 

 

ii) Five digit numbers
Question Image
= 120 + 48 = 168
 

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