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Class 11 · Mathematics
→From (10) subjects (5) subjects are to be selected. Chemistry must be selected, biology must not be selected, and mathematics and physics must not both be selected together. How many ways are there?
Class 11 · Mathematics
→From (8) subjects (4) subjects are to be selected but mathematics and biology cannot both be selected together. How many ways are there?
Class 11 · Mathematics
→From (9) chemistry and (6) biology books (5) books are to be selected with at least (3) chemistry books. How many ways are there?
Class 11 · Mathematics
→From (8) chemistry and (5) biology books (4) books are to be selected with at least (2) chemistry books. How many ways are there?
Class 11 · Mathematics
→In how many ways can (5) distinct chemistry books and (4) distinct biology books be arranged so that books of each subject remain together?
Class 11 · Mathematics
→A shelf has (4) distinct mathematics books, (3) distinct chemistry books, and (2) distinct biology books. If books of each subject must be kept together, how many arrangements are possible?
Class 11 · Mathematics
→One book is to be selected from each of four subjects. Mathematics has (5), Physics has (4), Chemistry has (6), and Biology has (3) books. The first Mathematics book and the second Chemistry book cannot be selected together. How many selections are possible?
Class 11 · Biotechnology
→Why is gene cloning useful in research?
Class 11 · Biotechnology
→What is the main function of DNA polymerase during the extension step of PCR?
Class 11 · Biotechnology
→What is the primary purpose of agarose gel electrophoresis?
Class 10 · Mathematics
→In a group of 150 students, 82 study mathematics, 74 study biology, and 36 study both subjects. How many study neither subject?
Class 10 · Mathematics
→In a class of 110 students, 68 study Biology, 57 study Chemistry, and 32 study both subjects. How many students study neither Biology nor Chemistry?
Class 10 · Mathematics
→Among 90 students, 43 like Chemistry, 39 like Biology, and 18 like both subjects. How many like neither subject?
Class 12 · Chemistry
→In which condition is a red blood cell most likely to shrink?
Class 10 · Science
→Why is reproduction not essential for an individual life but essential for a species?
Class 10 · Science
→Why is reproduction not essential for an individual life but essential for a species?
Class 10 · Science
→Why is reproduction necessary for continuity of a species?
Class 10 · Science
→Which organism shows binary fission?
Class 10 · Science
→Reproduction is not essential for an individual’s own life yet why is it important?
Class 10 · Science
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