Bulbs

In the box are 6 bulbs with power 75 W, 14 bulbs with power 40 W and 15 with 60 W. Calculate the probability that a randomly selected bulb is:

Correct answer:

40 W:  40 %
75 W or 40 W:  57.1 %

Step-by-step explanation:

p1=1006+14+1514=40%
p2=1006+14+156+14=57.1%



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