Question

There are $10$ true-false questions. The number of ways in which they can be answered is

• A. $10!$
• B. $2^{10}$
• C. $10$
• D. ${10}^2$

Answer 1

The correct option is B $2^{10}$

Since the question is true or false type, so each question has two choices either it can be true or false and answering each question is independent of other, so total number of ways of answering these question will be $=2\times 2\times ..........\times 2\left(10times\right)=2^{10}$