Answer:
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2/3 / 1/6
When dividing by a fraction, flip the second fraction over and change divide to multiply:
2/3 x 6/1 = (2 x6) / (3 x 1) = 12/3 = 4
The answer is 4
there are 4 of the 10-nf and 8 of the 100-nf capacitors which is a total of 12 items.
the probability of drawing a 10-nf is: 4 out of 12 =
the probability of drawing a 100-nf is: 8 out of 12 =
(a) "at least two" means: 2 or 3 or 4
Probability of 2 (10's) and 2 (100's): x x x =
Probability of 3 (10's) and 1 (100's): x x x =
Probability of 4 (10's) and 0 (100's): x x x =
2 or 3 or 4: + + =
(b) without replacement
2 or 3 or 4: + + = = =