TS EAMCET · Maths · Permutation Combination
The number of 4 letter words that can be formed with the letters in the word EQUATION with atleast one letter repeated is
- A 2400
- B 2408
- C 2416
- D 2432
Answer & Solution
Correct Answer
(C) 2416
Step-by-step Solution
Detailed explanation
Total number of ways \(=8^4\) \(\therefore\) Required number of ways of 4 letter words that can be formed by the word 'EQUATION' when atleast one letter repeated is \[ \begin{aligned} & =8^4-{ }^8 P_4=4096-1680 \\ & =2416 \end{aligned} \]
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