Question

In a hall there are 10 bulbs and their 10
buttons. In how many ways this hall can be
enlightened?
(B) 1023
(D) 10!
(A) 102
(C) 210​

Answer 1

Answer : (A) 102 . . . . . . .

Answer 2

Answer:

Question

In a hall there are 10 bulbs and their 10

buttons. In how many ways this hall can be

enlightened?

Solution ⬇️

✍️ Total no of bulbs = 10

✍️Since,at least one bulb is to be kept switched on , The total no of ways are

10c1

✍️10c2....10c10

✍️2¹⁰ - 1

✍️1024 - 1

=>1023

Step-by-step explanation:

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