A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective?

3 bulbs are to be selected at random from the lot. Each bulb in the lot is tested and classified as defective (D) or non-defective (N). The sample space of this...

Numbers of defective pens = 12 Numbers of good pens = 132 Total numbers of pen = 132 + 12 = 144 pens Favourable number of events = 132 Probability of getting a good...

Solution: Total number of outcomes = 12 P(x) = x/12 When 6 more black balls are put in the box, total number of balls = 12 + 6 = 18 Number of black balls...

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3 bulbs are to be selected at random from the lot. Each bulb in the lot is tested and classified as defective (D) or non-defective (N). The sample space of this...

Out of 52 cards, one card can be drawn in 52 ways. So, total number of elementary events = 52 (i) There are four ace cards in a pack of 52 cards. So,...

Number of kings and queen in a deck of 52 cards = 8 P( either a king or a queen) = 8/52 = 2/13 P(neither a king nor a queen) = 1-2/13...

There are 6 defective bulbs out of 24 bulbs Favourable number of elementary events = 24 – 6 = 18 ∴ Probability that the bulb is not defective =18/24=3/4 When the selected bulb...

The resistance of the bulb is given by R =v2/ P. So, the resistance of 60 W bulb is more than the resistance of 100 W bulb. When they are connected...