in a competitive exam consisting of 100 questions. 2 marks are awarded for each correct answer and -1 for each worng answer. lf a student has written 70 correct answer and 30 wrong answers what is his / her score?
Answers
Answer:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
Step-by-step explanation:
optics, science concerned with the genesis and propagation of light, the changes that it undergoes and produces, and other phenomena closely associated with it. There are two major branches of optics, physical and geometrical. Physical optics deals primarily with the nature and properties of light itself.
Answer:
Correct answer mark =2
wrong answers mark =-1
Step-by-step explanation:
number of correct answers =70
=70×2=140
number of wrong answers =30
=30×-1=-30
score earned=140