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Grade: 11
        
total number of four letter words that can be formed using the word CALULATION
10 months ago

Answers : (1)

subrat
61 Points
							Ans must be 2454. In order to solve such question form cases. Case 1: All distinct - (8C4*4!). Case 2: Two same, two distinct-(3C1*7C2*4!/2!). Case 3: Two same, Two same- (3C2*4!/2!2!). On solving you will get 2454.
						
10 months ago
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