Question
A box contains 5 red, 4 blue and 3 green balls. Two
balls are drawn at random without replacement. Find the probability that the two balls are of different colours.Solution
Total balls = 5 + 4 + 3 = 12 Total ways to choose 2 balls = 12C2 = 66 Unfavourable cases: both balls same colour. Red–red: 5C2 = 10 Blue–blue: 4C2 = 6 Green–green: 3C2 = 3 Total same-colour pairs = 10 + 6 + 3 = 19 So favourable pairs (different colours) = 66 − 19 = 47 Required probability = 47/66.
When storing different kinds of fruit together, it is essential that their temperature requirements:
Which of the following plant hormones is known to accelerate flower senescence in many cut flowers like roses?
The moisture content of grain for safe storage should be below:
In chrysanthemum cultivation, which stage of flower development is ideal for harvesting flowers meant for long-distance transport?
Which components make up the xylem in angiosperms?
‘Tapka’ is a commonly used term referring to the harvest maturity stage of which tropical fruit?
Which marigold species is characterized by its larger bloom size and tall plant stature?
The disorder known as ‘fruit cracking’ is most often a significant problem in which of the following crops?
The "Infiltration Rate" of soil decreases over time because:
What is the ideal concentration of COâ‚‚ recommended in polyhouse cultivation for optimal plant performance?
