- 30 defective earphones got mixed with 150 non-defective earphones. A student randomly picks one earphone. Find the probability that it is defective.
A bag contains 5 red balls, 7 blue balls, and 8 green balls. Two balls are drawn at random. What is the probability that both balls drawn are of the sam...
A bag contains 8 yellow balls, 7 orange balls, and 3 blue balls. Two balls are drawn at random. Find the probability that the two balls are yellow.
A poly-bag contains (3a - 4) red, (2a - 3) white, and (a - 1) black rubber bands. Two rubber bands are drawn randomly from the bag, and the probability ...
Three cards are drawn one after another with replacements from a standard deck of 52 cards. What is the probability of getting the first card a Queen, t...
A bag holds 12 pink balls and 13 white balls. If two balls are randomly drawn from the bag, what is the probability that the two balls are of different ...
- There are black and white marbles in a jar in the ratio 4:5. After 20 marbles of each type are added, the ratio becomes 6:7. Find the original number of wh...
In a box, there are 6 red balls, 8 green balls, and 10 blue balls. If one ball is drawn at random, what is the probability that the ball drawn is either...
A container has 15 brown, 10 gray and 5 gold coins. Two coins are randomly chosen from the container, what is the probability that a brown and a gold co...
The probability of selecting 2 one-rupee coins from a collection of 'a' one-rupee coins and 4 two-rupee coins is 1/3. Determine the probability of rando...
