a question paper contain 12 question 7 in group a and 5 in group b and question are arranged numbering from 1 to 12 in order. it is advised to answer question no.4 and any 3 from group a., and q. no 8 from and any 2 from group b. in how many ways Candidate can select 7 questions to answer
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the answer is very important and hard
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There are 5 question in parts & 7 question in parts 2
Atleast 8 question have to be attempted & 3 from each part.
There are 3 options
(1)3 from part 1 & % from part 2
no, of ways
=5×2×7×3
=210 ways
(2)4 from part 1 & 4 from part 2
=5×7×5
=175 ways
(3)5 from part 1 & 3 from part 2
=35 ways
Total number of ways =210+175+35
420 ways
Hope it helps
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