1.Set Theory
hard

माना $S=\{1,2,3, \ldots ., 100\}$, तो $S$ के उन सभी अरिक्त (non-empty) उपसमुच्चयों $A$ जिनके अवयवों का गुणनफल सम है, की संख्या है 

A

$2^{100} -1$

B

$2^{50} (2^{50} -1)$

C

$2^{50} -1$

D

$2^{50} + 1$

(JEE MAIN-2019)

Solution

Product is even when atleast one element of subset is even Hence required number of subsets = total subsets -number of subsets all whose elements are odd $= 2^{100} – 2^{50}$

Standard 11
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.