Q. 225.0( 1 Vote )

Mark the correct

Answer :

In the room there are 12 bulbs of same wattage, each having separate switch.

We have 2 options for each bulb i.e. either switching it ON or to switching it OFF.

The 1st bulb can be switched ON or OFF i.e. 2 choices.

The 2nd bulb can be switched ON or OFF i.e. 2 choices, and so on.

Now, for 12 bulbs we have total 212 choices.

But, as we have to illuminate the room, so the single choice in which all the 12 bulbs are OFF should be omitted.

So, we have total (212 – 1) ways to light the room with different amounts of illumination.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :

<span lang="EN-USRD Sharma - Mathematics

<span lang="EN-USRD Sharma - Mathematics

<span lang="EN-USRD Sharma - Mathematics

In how many ways RS Aggarwal - Mathematics

In how many ways RS Aggarwal - Mathematics

For a set of fiveRS Aggarwal - Mathematics

A mint prepares mRS Aggarwal - Mathematics

A sample of 3 bulRS Aggarwal - Mathematics

From among the 36RS Aggarwal - Mathematics

If 20 lines are dMathematics - Exemplar