How many numbers lying between 500 and 6oo can be formed with the help of the digits i 2, 3, 4, 5, 6 when the digits are not to be repeated?
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Answer: 20
Step-by-step explanation:
S={523,524,525,526,532,534,535,536,542,543,545,546,552,553,554,556,562,563,564,565}
Therefore, n(S)=20
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