AP EAMCET · Maths · Permutation Combination
In an examination, a student has to write exams in 8 different subjects. He is declared fail if he fails in at least one subject. The number of ways in which he can fail is
- A 127
- B 256
- C 255
- D 7
Answer & Solution
Correct Answer
(C) 255
Step-by-step Solution
Detailed explanation
The number of ways, in which student can fail \(=\) Number of ways, he can (fail in 1 exam + fail in 2 exams \(+\ldots . . .+\) fail in 8 exams)…
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