COMEDK · Maths · 4. Permutation Combination
How many numbers greater than 40000 can be formed from the digits \(2,4,5,5,7\) ?
- A 12
- B 24
- C 36
- D 48
Answer & Solution
Correct Answer
(D) 48
Step-by-step Solution
Detailed explanation
The given digits are \(2, 4, 5, 5, 7\). We need to form 5-digit numbers greater than \(40000\). A 5-digit number is greater than \(40000\) if its first digit is \(4, 5,\) or \(7\). Case 1: The first digit is \(4\). The remaining digits are \(2, 5, 5, 7\). The number of ways to…
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