Elitmus Exam Numerical Ability Algebra

In a certain examination paper, there are n questions for j=1.2...n. There are 2^n-1 students who answered j or more questions wrongly. If the total numebr if wrong answers is 4095, then the value od n is?

A. 12

B. 11

C. 10

D. 9

Read Solution (Total 5)

Elitmus Other Question

solve the inequality
{(x^2)-7|x|+10}/{(x^2)-6x+9}
Yr mera 13 oct wala result he nhi aya???delhi me diya tha ..kisse ka aa gya kya???