AP EAMCET · Maths · Permutation Combination
The number of natural numbers less than 500 in which no two digits are repeated is
- A \(374\)
- B \(376\)
- C \(378\)
- D \(380\)
Answer & Solution
Correct Answer
(C) \(378\)
Step-by-step Solution
Detailed explanation
Number of 3 digit natural number less than 500 in which no two digits are repeated \(=4 \times 9 \times 8=288\) 4 ways \(=4\) number \((1,2,3,4)\) Now number of 2 digit natural numbers less than 500 in which no. of two digits are repeated \(=9 \times 9=81\) Now number of 1 digit…
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