Q. There are 10 true-false questions in an examination. Then, these questions can be answered in
A) 240 ways
B) 20 ways
C) 1024 ways
D) 100 ways
Explanation
(c)
$\because$ Each true-false questions can be answered in 2 ways
$\therefore$ Number of ways in which 10 questions can be answered
$= 2^{10} = 1024$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.