Explanation needed, why will we consider those below 70,as explained in the solution??

Post 5737238581739520
cat'17 - 97.84, cat'18 : 98.65, iift'18: 98.3 xat'19: 99.73. miles to go before i sleep.
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qwertycop
@qwertycop  ·  78 karma

same doubt. less than 70% students don't secure any certificate so why keep them in consideration?

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Anon_pizza
@Anon_pizza  ·  3 karma

Because they haven't said in how many ways  could a student get at least one certificate. They're asking for the whole set.

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