In a box there are 8 red, 7 blue, and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

Total number of balls = 21 Probability of a ball is neither red nor green = ^{7}C_{1} / ^{21}C_{1} = 1/3

- A coin is tossed successively three times. Find the probability of getting exactly one tail or two tails?
- Tokens numbered 1 to 350 are in a bag. What is the probability that the Token drawn has a number which is a multiple of 6 or 7?
- In a box there are 12 orange, 5 white, and 7 blue balls. One ball is picked up randomly. What is the probability that it is neither white nor blue?
- If A and B are any two events such that P (A) + P (B) − P (A ∩ B) = P (A), then
- There are 8 boys and 4 girls giving interview for a job. If three of them are selected, then what is the probability that one of the three is a girl and the other two are the boys?
- If the letter of the word Apples is arranged at random, what is the probability that all the vowels comes together?
- A box contains 7 blue and 7 green balls. The probability of drawing three balls of the same colour is
- Roger Federer gets a chance of 60% to win 1st set of tennis and Andy Murray gets a chance of 55% to win 2nd set of tennis. In what Percent of cases are they likely to contradict each other, narrating the same incident?
- In an examination, a candidate is required to pass all six different subjects. The number of ways he can fail is:
- A bag contains 20 white and some black balls. If the probability of drawing a black ball from the bag is 1.3 times that of drawing a white ball, find the number of black balls in the bag.

More Probability Questions

×

×