How many 100 watt light bulbs can run on a 15 amps circuit at once without blowing the fuse

I know the formula is:

Power= Current x Voltage

But how to answer this question using this equation? Please explain.
Thanks for the help!

You have you answer if you're in the U.K. In North America, the answer would be:

P = 100 Watts
E = 120 Volts
I = 0.8333 Amps per bulb
R = 144 Ohms resistance.

So a 100 Watt bulb on 120 Volts uses 0.8333 Amps.

15 / 0.08333 = 18.

So a 15 Amp circuit can power 18 100 Watt lights bulbs.

Assuming you are in the UK where V = 240V
then total wattage using 15A will be
W = 240 x 15
W = 3600 Watts

Since each bulb uses 100 watts then the number of bulbs = 3600/100 = 36

If you are in the USA then V = 115V, in this case W = 115 x 15 = 1750 Watts
Number of bulbs = 17

It depends on the ampage limit on the fuse whether its 3A or 13A

W = 240 x 15
W = 3600 Watts
100W bulb
3600/100 = 36 bulbs depending on the fuse (p.s for UK)