Mathematics - Permutation & Combination Question with Solution | TestHub
MathematicsPermutation & CombinationnPr & nCrMedium2 minQB
MathematicsMediumsingle choice
Statement I: The number of ways of writing 1400 as a product of two positive integers is 12. (counting factor pairs without regard to order) Statement II: 1400 is divisible by exactly three distinct primes.
Options:
Answer:
B
Solution:
has 24 divisors and hence 12 factor pairs. Its three distinct prime divisors alone do not specify the exponents or determine the pair count. The count of 12 treats the factor order as irrelevant.
Stream:JEESubject:MathematicsTopic:Permutation & CombinationSubtopic:nPr & nCr
⏱ 2mℹ️ Source: QB
Doubts & Discussion
Loading discussions...
