Question
A bag contains 4 red balls, 5 blue balls, and 6 green
balls. Two balls are drawn at random. What is the probability that both balls are of the same color?Solution
Total balls = 4 + 5 + 6 = 15. Total ways to select 2 balls = 15C2 = (15 × 14) / 2 = 105. Favorable outcomes for the same color: Red: 4C2 = (4 × 3) / 2 = 6. Blue: 5C2 = (5 × 4) / 2 = 10. Green: 6C2 = (6 × 5) / 2 = 15. Total favorable outcomes = 6 + 10 + 15 = 31. Probability = 31/105. Correct answer: e.
The finfish which contributes maximum to the global aquaculture is
Where is CFTRI situated?
Which of the following methods is used for maintaining breeder’s seed in self-fertilized crops?
---------------is a method where new genes are introduced into an organism's chromosomes to change its genetic makeup?
The RPM of standard PTO, equipped in tractor, is
Zeno is a variety of
Which of the following is correct in case of seedlings?
EXIM Policy is the export import policy of the government that is announced:
Dead spots on the leaf surface, not on the leaf margins is a deficiency symptom of:
One cusec of water is equal to how many liters of water per second?Â
