All possible 6 digit natural numbers are formed using the digits 1, 2, 3, 4, 5 and 6 without repetitions. How many numbers so formed would have 2 ahead of 4 and 5?
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240 Numbers can be formed if 2 ahead of 4 and 5 ,in all possible 6 digit natural numbers are formed using the digits 1, 2, 3, 4, 5 and 6 without repetitions.
Step-by-step explanation:
Lets make a group of 3 Digits
2 , 4 & 5
2 is ahead of 4 & 5
so it can be
245 or 254 in 2 Ways
3 Position out of 6 can be filled by 3 other numbers in
⁶P₃ ways
= 6!/3!
= 120
120 * 2 = 240
240 Numbers can be formed if 2 ahead of 4 and 5 ,in all possible 6 digit natural numbers are formed using the digits 1, 2, 3, 4, 5 and 6 without repetitions.
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