Question
A total of 24 points are given on a plane, out of which
10 are collinear. How many distinct straight lines can be formed using these points?Solution
Lines formed from 24 points = 24C2 = (24 × 23)/2 = 12 × 23 = 276
But the lines drawn with 10 collinear points will be same and it will be considered as single line.
So, lines formed from 10 collinear points = 10C2 = (10 × 9)/2 = 45
Desired number of straight lines that can be formed = 276 – 45 + 1 = 232
The “Nutrient Index” concept in soil fertility assessment was introduced by:
The Phenomenon of inheritance of linked genes in same linkage group is called as
Which of the following statement is not correct about the facilitated diffusion?
Water movement under unsaturated soil conditions is mainly driven by_____
Which insect lays eggs in guava fruits, causing damage and rendering them unmarketable?
In furrow irrigation, which factor mainly influences the uniform distribution of water?
Karonda is a rich source of
The process of loss of water from plant is
Why are insects considered among the most successful organisms on Earth in terms of survival and proliferation across ecosystems?
In which part of India the shifting cultivation, locally known ‘Jhuming’ is widely practiced?
