A box contains five 10 Ω resistors and twelve 30 Ω resistors. The resistors are all unmarked

and of the same physical size.

(i) If one resistor is picked out at random, determine the probability of its resistance being 10

Ω. (5 mks)

(ii) If this first resistor is found to be 10 ohms and it is retained on one side, find the probability

that a second selected resistor will be of resistance 30 Ω

asked by guest
on Jan 19, 2025 at 12:44 am



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