A) 271
B) 272
C) 300
D) None
Correct Answer: C
Solution :
[c] =---: digits are from 0 to 9. = (Only once) + (twice) + (thrice) \[={{\,}^{3}}{{C}_{1}}.9.9(1){{+}^{3}}{{C}_{2}}.9(2){{+}^{3}}{{C}_{3}}.1(3)\] \[=3.81+3.18+1.3\] \[=\]You need to login to perform this action.
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