Question

a question paper consists of 34 question and is divided into four section a,b,c and d​

Answer 1

Explanation:

for example,

Question

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A question paper is divided into 3 section A, B, C containing 3, 4, 5 question respectively. Find the number of ways of attempting 6 question choosing at least one from each section.

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Solution

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no of combinations= A B C total

1 1 4 6

1 2 3 6

1 3 2 6

1 4 1 6

2 1 3 6

2 2 2 6

2 3 1 6

3 1 2 6

3 2 1 6

∴

3 C 1 × 4C 1× 5 C 4+ 3 C 1 × 4C 2× 5C×3 + 3C 3× 4 C 2× 5C 1

⇒850ways

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