Math miscellaneousEasy
Question
A student is to answer 10 out of 13 questions in an examination such that he must choose at least 4 from the first five questions. The number of choices available to him is
Options
A.140
B.196
C.280
D.346
Solution
Number of choices = 5C4 × 8C6 + 5C5 × 8C5
= 140 + 56.
Hence, (B) is the correct answer
= 140 + 56.
Hence, (B) is the correct answer
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