A student is to answer 10 out of 13
questions in an examination such that
must choose at least 4 from
the
first question: The numbes of
choies
available for him are;???
Answers
Answered by
1
Step-by-step explanation:
ANSWER
The number of choices available to him is
5
C
9
×
8
C
6
+
5
C
5
×
8
C
5
=
4!1!
5!
×
6!2!
8!
+
5!6!
5!
×
5!3!
8!
=5×
2
8×7
+1×
3×2
8×7×6
=5×4×7+8×7
=140+56
=196
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