TS EAMCET · Maths · Permutation Combination
The number of four digit numbers that can be formed using the digits \(1,2,3,4,5,6,7\) which are divisible by 4 , when the repetition of any digit is not allowed, is
- A \(100\)
- B \(200\)
- C \(300\)
- D \(400\)
Answer & Solution
Correct Answer
(B) \(200\)
Step-by-step Solution
Detailed explanation
\(1,2,3,4,5,6,7\) For number of numbers divisible by 4 , unit digit can be either of \(2,4,6\). When unit digit is 2 , digit at tens place can be \(1,3,5,7\). \(\therefore \quad\) Possible numbers \(\frac{}{4} \times \frac{}{5} \times \frac{}{4} \times \frac{2}{1}=80\) When unit…
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